I’ve also been thinking of this. Something in the Surface to Switch size range would be good. I think it’s important it functions as a full Surface product should to make it independently useful outside of gaming use.
It's definitely needs to have enough battery power to power the chip for a significantly long enough time, so perhaps 2-3 hours of mobile gaming. I'm thinking with a 6 TF GPU + Ryzen, you're still looking at something closer to Surface Laptop in terms of size and cooling requirements, I think Surface the tablet is a little too tiny.
But looking at MS strategy here:
1080p/1440p with 6TF is plentiful for next gen. And it's reasonable to have something like this in a laptop form factor, not quite tablet though.
We expect to see more 1080p/1440p laptop style screens going forward, it's not like we see laptops moving to 4K. Its there, but they also do weird resolution things so that that things only appear crisper not smaller. A good baseline for quality for graphics. Xbox already supports DSR so older 4K titles will benefit here on this device.
4K resolution targeting living room experiences. Reasonable here to support 120fps @ 1080p. Or other similar options. 4K for those that want it, HDR etc. DSR of course, an overall better experience than above. As suggested, likely starting somewhere in the 12 TF range leveraging reconstruction techniques and what not.
That should theoretically, allow for Scorpio to stick around for a couple years beyond 2020. It's not the new baseline, but it can be used for games that don't take full advantage of that Ryzen processor.
