This proves that Microsoft gained something by making it easy to port games between the PC and the 360. Valve would probably not care about the 360 if it wasn't the case.
Sony already used non-conventional architectures twice (PS2 and PS3). The first time it worked well, not because developers liked it but because the PS2 dominated so much that there was no choice but learn the ugliness of the Emotion Engine. This time, many developers clearly don't feel as forced to learn Sony's new novelty, since the PS3 isn't nearly as successful as the PS2 was.
I think the PS4 will use a more conventional architecture.
PS: Don't get me wrong, there's nothing wrong with the Cell in itself. It's a great choice for many programming tasks, just not the best for games (at least in its current form, with only one PPE instead of 2 or 3 as Sony had originally planned).
My Mario Kart Wii friend code: 2707-1866-0957
