Here's a pseudo-technical article about the Cells technology.
http://www.blachford.info/computer/Cells/Cell0.html
It's an interesting read into what the architecutre of the cell chip is going to be like. And as for only being for the PS3, a friend made an interesting observation that IBM just sold off they're desktop/laptop division - the whole lot to a Chinese company, along with the rights to use the IBM brand name for the next 3 years. So now the only x86 machines they're selling are to the top end / server market.
While probably a smart move in itself considering the low margins in the PC market, but in light of this new processor architecture, possibly a move to make room for a new range of PCs?
http://www.washingtonpost.com/wp-dyn...004Dec7_2.html