A slim is probably the last thing they are thinking about, if they can't shift enough hardware now they know that investing even more billions in the slim is not going to turn people who have snubbed the PS3 just because they make it look different.
And with MS and the Valhalla up their sleeve (merged the CPU, GPU on one chip) they are probably every bit as ready as Sony to slim down but as with Sony it's a risk probably not worth taking.







