Re: telly?
Not sure what the downvotes are for.
UHD's last best hope is as a TV/Console/PC screen in the lounge. I projector is probably better, but might be too much fuss. As has been said, there's no point having hi-res when the compression pixelates the screen with any movement. PC's on the other hand tend to do things right, but even then, the graphics cards to drive PC games at those resolutions are not in Joe Public territory yet.
Still, it might be like HD is now - there's not much content, but may as well get the better screen if the cost differential isn't too much.