Exactly - the CPU has never been the bottleneck in the first place.
When it comes to compiling a game written in C, you don't care about the object CPU - you care about the API. The only exception is endian-ness, but in games you rarely care about that anyway.
Nor would it affect the fact that to get a PC to run games equivalent to a console you'd need to spend substantially more - and on top of that, it wouldn't change the fact that publishers wouldn't bother porting to a much smaller architecture, and the retailers wouldn't bother giving it any shelf space because there's no demand.
There's a mass of differences that are far more important than the CPU architecture when it comes to porting games.
