X1 doesn't need to be more powerful than the PS4, all it has to do is hit 1080p with 30-60 fps on a regular basis. I've never seen a console gen peak during the half-year after launch so it's completely possible. Maybe the PS4 will be capable to 90-120fps by that time but 1080p will be the resolution peak this gen. Both apu's are far to weak to output anything close to 4k on any game that matters.