Not really the thread for it perhaps (is their one?) but just recently I discovered the joys of the XBO Happeguage TV Tuner.
The use case for it is probably pretty limited, but I happen to be in that demo...I cut the cord and dont have cable TV, but do watch NFL on OTA (antenna) TV. This doo-dad lets me integrate everything into my Xbox now which solves a couple problems, no longer have to switch inputs to watch OTA TV for one. The other is I had my XBO hooked up to my HTIB reciever via optical, and my TV not hooked to the HTIB at all (cant remember why, but this audio connection stuff gets super complicated and frustrating to me fast), so whenever I watched TV it defaulted to the crappy TV speakers, which was lame. This way since it's all through the Xbox, the sound is always through the HTIB whether Xbox or TV.
So the cool thing is now I'm at a point where the Xbox is truly the only input I need, just like they planned. I didn't really plan it this way, but now it is. I remember Jeff Cannata recently talking on a podcast about this (he was mentioning he's been playing his Xbox more because of the forgotten all in one TV stuff kinda making it his default box for TV reasons). It's kinda forgotten all the all in one box stuff, but actually still cool. XBO has Sling Tv and Plex (covers all streaming from PC needs) apps which are truly the two biggies for me, as well as of course all the Netflix/Prime/Hulu/whatever apps (which I dont personally use) so really everything is covered now with the antenna adapter. It gives you a neato professional TV guide style thing (Oneguide), and if you opt to set aside a piddling 4GB of HDD space during setup, you get 30 minutes worth of automatic fast forward/rewind/pause of live tv. It doesn't have full true DVR capabilities yet, but I'm guessing they may come in an update oneday. Another cool thing is the Happeguage adapter allows you to stream OTA TV from your Xbox to any tablet or smartphone on the local network through smartglass (which is also becoming a pretty nifty app) as well. I personally wont have much use for this.
It all looks nice and futuristic too, it seamlessly does kind of a picture-in-picture minimizing thing when you fullscreen a menu or whatnot, you can even watch TV in the sidebar while idling in Destiny (although the picture is necessarily pretty small) 360 made some steps to being a media box but with XBO they've really taken it to a good level.
Problems? One is the price...the Tuner is $60, not too bad but still a bit pricey. Then you need the media remote if you dont already have it (well you dont NEED it, but you'll want it, and it's a nifty little remote anyway) that's another $25. And then if like me you dont have kinect hooked up and want to integrate your other devices (I haven't done this step yet) you'll need an IR extender cable which is another $15, so you're looking at $100 which is a bit steep I suppose.
And I have encountered one technical issue, on some TV the audio has desynced (OTOH sometimes it's fine, may depend on channel, audio format of the program, etc). Apparently it's a bit of an issue if you use the XBO optical out like me due to the Xbox somehow processing that output differently. I'm still researching fixes etc. A simple cold boot of the Xbox alone may help apparently, haven't tried it yet.