If you look from a distance of one foot (12 inches), you can divide 11459 by 12, which is ~955 DPI. Of course, this would be pretty overkill (e.g. in theory you don't really need edge anti-aliasing at this resolution). In practice, it's better to do proper edge anti-aliasing with a good enough resolution, and focus on other factors such as color reproduction, contrast, etc.
4k resolution coming
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If you look from a distance of one foot (12 inches), you can divide 11459 by 12, which is ~955 DPI. Of course, this would be pretty overkill (e.g. in theory you don't really need edge anti-aliasing at this resolution). In practice, it's better to do proper edge anti-aliasing with a good enough resolution, and focus on other factors such as color reproduction, contrast, etc.
Silent_Buddha
Legend
I had forgotten that I'd wanted to address this when it was originally posted. But figured I'd do it now. Printer DPI isn't directly comparable to PPI on monitors. For any given DPI/PPI number the dots will be significantly larger for a printer than for a monitor. due to printers having a requirement with regards to coverage. Each dot from a printer must overlap other dots otherwise you would end up with white gaps causing black to look more grey, for example.
This is even worse if you compare laser printers to inkjet printers as inkjet printers traditionally have significant bleed compared to laser printers.
Because of the above you also don't have to account for pixel separation as you do on monitor displays. No matter how close you get to a laser printed page you'll never see individual dots (except for color printers, which is why higher DPI is much more beneficial for color printing than for B&W printing) as you can with a monitor. What becomes possible to see is irregular sides on fonts and lines if the actual dots are too large. Which generally isn't a problem until you get to smaller font sizes.
So while PPI on monitors is concerned with how many non-overlapping pixels you can cram into a square inch, DPI on printers is concerned with how many overlapping pixels you can get into each square inch which leaders to larger dots and smaller pixels at the same numbers.
Regards,
SB
PPI on prints has more of an effect on the sub colours that change the shade/tone of the colour. Say a yellow with 1% cyan, 3% magenta and 80% yellow. The cyan and magenta dots will be pretty obvious if the PPI is not high enough when viewing up close, because such a small percentage means less dots are required and the spacing between them quite large. Of course, introducing other colours like Light cyan/magenta, orange, green etc will also help in eliminating how noticable these dots are as well as improving the accuracy of the colour. But... we're getting off topic now.
Keep in mind that screens are usually flat not spherical, so the 80° FOV would require ~18000 pixels in this case.
Aliased edges (with sufficient contrast) would still be noticeable at that resolution due to hyperacuity. I.e. while you can't tell apart two dots separated by one pixel you still notice that the stairstep line segments are not perfectly aligned.
UniversalTruth
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Hmm... very great 
Panasonic Announces World's First 20-Inch 4K Tablet
Toughpad 4K UT-MB5: Key Features
Would be amazing if used as a monitor with other systems...
Panasonic Announces World's First 20-Inch 4K Tablet
Toughpad 4K UT-MB5: Key Features
- 4K Visual Experience: 20-inch IPS Alpha LCD screen with 3840x2560 pixel display featuring 230 pixels per inch and 15:10 aspect ratio
- High-Performance Processing Power: Intel Core i5-3437U vPro processor with NVIDIA GeForce 745M GPU
- Operating System: Windows 8.1 Pro
- Storage & Memory: 256 GB SSD, 8 GB RAM and 2 GB VRAM
- Connectivity & I/O: Intel Centrino Advanced-N 6235 Wi-Fi 802.11 a/b/g/n, Bluetooth v4.0 (Class 1), USB 3.0, SDXC card slot, smart card reader, docking connector
- Camera: 1280 x 720 pixel built-in front camera
- Durability: Business-rugged with resistance to 12-inch drops to 26 angles (non-operating) and 30-inch drop to its back (operating)
- Battery: 2 hours per MobileMark 2007 testing
- Lightweight Portability: 5.27 lbs., 0.49 inch thick
Would be amazing if used as a monitor with other systems...
Battery - 2 hours. Not really portable. And I don't know of any tablet with an HDMI in, which is a real shame. I suppose you can Miracast to it.
Blazkowicz
Legend
HDMI-in is a very rare feature, I can see one on the FM2A88X Extreme6+ motherboard (ATX) but no mention of the maximum res, it looks like it's a dumb switch simply to use the PC's monitor with another device (even if the PC is off)
If you use displayport for output and want to use a HDMI in, I suppose you need real HDMI capture, that's what the new Xbox has?, but there's cost and complexity to that.
I'm sure the tablet uses eDP, internally.
Miracast should do it ; I reckon you would rather want to use wired ethernet, or Wifi 60GHz to beam 4K.
It will probably be 802.11ad, with significant consumer availability in [strike]2014[/strike] [edit : 2015]. Maybe.. Also, it's same-room Wifi, which sucks if you wanted to stream across a house or company building but in the same room you won't suffer from crowded spectrum at least. It's instantly blocked by walls and the air's oxygen absorbs it.
I'm clueless about the power it uses. Will that tech become the next big hot thing then get ubiquitous, or will it be expensive and rare, I wonder.
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UniversalTruth
Veteran
Prices go down to more affordable levels for everyone?
Dell 28-Inch 4K Monitor Priced at $699, Coming This Month
Dell 28-Inch 4K Monitor Priced at $699, Coming This Month
Only capable of 30hz though.
Is this really true? I don't see it in the link provided, but that'd be disappointing.
http://www.legitreviews.com/dell-p2815q-28-inch-4k-display-just-699-coming-january-23rd_133531
Looks like only 30hz at 4k.
It's a TN as well.
That's a pretty pathetic drop. Guess I'll be waiting until at least 2018.
Maybe they'll get bigger at the same time…
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