The reality of all of this is Jobs knows the future is "laptop" portable machines with low power, high performance (found in the intel roadmap). The G5 laptops aren't as capable as they could be right now..
Where the move to Intel matters is right there, in the laptop market.. Desktops sales don't even match laptop computer sales anymore.
IBM's volume business is really NOT PC sales, it's more server solutions (linux ones). Not even the SAME business so this is another apple/oranges thing..
The cell is focused on being something other than a desktop CPU, and the game machines coming out have specialized processors for gaming. They may not be the best implementations if one is to consider a general purpose computer..