rumor ps4 might use ps3 cell chip

[Alby_da_Wolf]

Using the SAME chip, simply shrunk, would be a mistake, even Wii, that doesn't rely on brute force, has more than double computing power respect to GC.
Shrunk version of first Cell will be released anyway along PS3 life, to lower costs.
But as SPE's are still underused, while most agree that that lonely general purpose PPE single core could be at its limits in some cases, and memory is too little too for some possible uses, Sony could put on PS4 a new Cell with little more SPE's, maybe 2-4 more, and double or quadruple that single PPE and put at least 2GB main RAM.
This would (almost) quadruple computing power only where needed, saving a lot of money, given the large number of items involved. And given IT evolution, it would be even more feasible and cheap, considering that in 4 years even a quadrupling of the total number of transistors would result in a CPU costing less than the current one now. Heat produced would be lower and its dissipation easier too.
What I'd give for for sure is that Sony won't try again to have a performance and feature gap so large to force itself to have a PS4 launch price as high as PS3's one.