Given how much Memory has been shoved into the GPUs you'd think that would be the case...... but Running a fully Rendered 3D Game like Uncharted at 4K Resolution is going to be expensive..... even $300 PC GPUs can't do it..... unless ofcourse if you give up 60FPS then I guess its possible....
Nornally I would say this emphasis on Graphics is pointless but TVs are getting bigger and the bare minimum 4K Resolution (3840×2160) is affordable...... continuing to make games run on 1080p then making a 40inch TV stretch it to make it fit is going to result in very ugly Games. Even casual gamers will feel like they were cheated. So I can see were this Pressure is coming from......