Xen on 30 January 2014
The X1 GPU isn't up to par, and that's never going to change with any kind of optimization. They are both x86-64 machines, and the improvements you're gonna see from launch 'till end gen are gonna be FAR smaller than prior. Different effects, particles, textures blah blah blah are a whole another discussion.
Read: PS4 is gonna stay Full HD for most intents and purposes, and X1 (mostly) isn't going to move much beyond 720/900p.
End discussion.
