Doesn't GameCube, Wii, PS3 and Xbox 360 have Altivec?
Numerically that is effectively "all".
GC has 37 instructions, Wii a few more.
360's cores does have SIMD.
Cell's PPE doesn't I don't think but the SPU's handle that and there are 7 cores.
Cell's capacity exceeds the 360 in floating point power...but yet better games are on the 360. Why? Because floating point power does not directly translate to a better gaming experience. The 360 has a more powerful gpu but weaker overall cpu. 360 still takes the cake.
SAM460 can/may support much more powerful gpus (even more powerful than 360 and PS3) then any PPC Mac.