The Cell is very usefull for pre-rendering computations (ie generating geometry shapes for water ripples , particle repulsion and interaction etc- etc ) also Physics , colision detection and ray-tracing (still not fast enough for real time tracing though) And Digital Signal processing (sound , and video) -
These are all things cant be done with a GPU and are slower when done on a CPU the PS3 has alot of scope for future gameing , there is a longer learning curve and larger tool, library development cost associated with it but it can go places where the rest cant follow.
The X360's CPU is a Compromise between the Cell and a Normal Power PC (like the Wii Uses) - so it also has many complexitys to deal with (like multi core and SIMD).
I Think there are many games on both Xbox360 and PS3 which are only using a single core - that is often all they need. !
PS3 number 1 fan
