I think there is a slight difference between streaming quality and game resolution though.
regardless - the XBOX One has a great upscaler, as long as I THINK it looks good, I could care less what others think.
I think the better argument is that there are countless games that have shown us that graphic quality doesn't matter - as long as the game is fun.
Minecraft
Geometry Wars
countless indie games
I still get a kick our of Doom and Quake every now and then.