It's a bad idea to hope for backwards compatibility on Nintendo's next console platform with an AMD CPU! Those things are known to be slow AF when it comes to emulation ...
If it were a quad core Haswell CPU clocked at 3.6 Ghz then it would be worthwhile to explore that prospect with the x86 ISA ...
Another thing to account for in backwards compatibility are the GPU architectures too and how much access Nintendo allows for it. For Nintendo's next console to be backwards compatible with the WII U it has to be known whether or not their proprietary graphics API targets any lower than AMD IL. If the backend of their API is agnostic then just about any GPU that is capable of the DX11 feature set will suffice for backwards compatibility. If the backend targets AMD IL but no lower then Nintendo is stuck with an AMD GPU to support backwards compatibility. Going any lower will kill a lot of chances of their next console been backwards compatible and they'll ultimately need to stick with AMD's VLIW5 architecture to be able to be backwards compatible with the WII U in their next console ...
