Chances are it will be in there going by what Iwata said so I wouldn't worry if I was you. If the NX is BC hopefully they found a really good way of shrinking down the chips necessary for BC with AMD's help or something.
Correct, but don't expect it to be hardware based unless Nintendo has a couple million WiiU PowerPC chips just laying about and they can plop em in to the new system along side a new APU from AMD.
I honestly could see a VM software like solution much like MS is doing with One and 360