Intel's CPU will be an option, but surely you can get it with AMD as well:
Fury X beats Titan X at many games at 4k resolution and even more at 5k.
Fury X beats 980 Ti (pre-emptive release by nvidia, that anticipated Fury X) at 4k, whit the same recommended price.
Now, these boxes will have to of Furys.
FuryX also has a nice "FPS cap" feature, which allows it to drop frequency to save power when you are beyond reasonable FPS (i.e. 90+, actual number depends on your taste).
Had they chosen to not allow Intel's CPU it would cripple it, but with i7 option, it's a great product.