I was reading this yesterday. Here's some more details:
http://www.asahi.com/english/Herald-asahi/TKY200709170055.html
Sounds like the cell is a bust for Sony outside of the PS3, which as we all know, isn't meeting expectations either. So they're selling it off to recoup loses (getting back half of the development cost).
While I'm not expert, I expect buying chips from the new Sony/Toshiba subsidary would be no cheaper, if not more than what they're paying for it now, as the new management will have to be profitable and not running at a loss. So I don't see how this will help a $399 PS3 come about.
This is also interesting as it suggests an admission by Sony that the PS3 was a step in the wrong direction, and as they are effectively getting out of the chip making business, the PS4 will likely not strive to be a super-computer console like the PS3 did. That's good, as the PS1 & 2 were not powerful systems, and they sold fantastically. I never understood why they felt they had to outdo Microsoft in the power department.







