Say what you will the Xbox One is the current graphics king with just about every major game site awarding RYSE the best looking game with Killzone on PS4 taking a close second.
We hear all this talk about 1080p and the ESRAM in the Xbox and yada yad yada but here's the deal If the Xbox One is programmed specifically for the Xbox One we already see a game like RYSE taking top honors over a game designed specifically for PS4 like Killzone.
Just imagine when a game like Halo 5 comes out and uses full DX11.2 and full 6gb's of Tiled Resources for textures it's going to most likely be the best looking game by miles.
Then you got another exclusive like Quantum Break for Xbox One. I'm thinking they are going to be using special dev tools to boost graphics maybe some DX11.2 and maybe some Tiled textures also. I think it's clear when developers use the full potential of the Xbox One this system will be hard to beat in graphics when you used it's full tool sets in development.
This is all before we even see the cloud go into full effect and you can do nifty things like do some fog and shadowing effects you also can do some advanced lighting effects on the cloud. Either way even if you just use the cloud to offload huge amounts of data for CPU this will intern free up tons of resources to just put towards graphics so either way you will be maximizing things for graphics.
I think it's obvious the Xbox One is like the little engine that could and when used to it's potential by talented developers and MS given them full dev tools with DX11.2 and Tiled Resources and the Cloud the Xbox One will be really hard to beat in any graphics king debate especially with upcoming exclusives. I'd imagine a new Gears running on Unreal 4 with DX11.2 and some Tiled Resources is going to be mind blowing.
Don't sleep on the full graphics capabilities of the Xbox One it's already showing what it can do and is currently the reigning graphics king.
Also this is not to say PS4 won't have it's showcases it will The Order will look nice even at 800p and Killzone already looks pretty good. And I'm sure a new Uncharted will look great because Naughty Dog is known for great artwork.