Why did Sony use the Cell processor in the PS3?

[leo-j]

Killzone3 said:

outlawauron said:
The Cell is an untapped potential; used correctly will be able to do some pretty amazing stuff.

 It already is, look at Uncharted or Killzone2.

No if you think thats the full potential of the spu's your loosin it, uncharted (according to developer) only uses 30% of the power the ps3 can bring up and thats amazing.