Actually, GC's CPU was comparable with Xbox CPU, even with lower clocks, thanks to architecture differences(P3 being a x86 CPU and Gekko being a PowerPC). Wii is way above the first Xbox in CPU power, as it runs at similar clock rates.
Based on the specs, PS4 seems quite bottlenecked by the CPU's. 8 Jaguar cores may be better than Cell, but not by much, we're talking about Atom competitors here. I believe GPU performance will be crippled because of the CPU choice.








