Another one trying to start it again. First of all, like MikeB already said, the Reality Synthesizer have been developed since the beginning of 2005 by Nvidia.
Like I said, bolted on at the last minute. Let's look at the timeline from wikipedia and you'll see why.
In 2000, Sony Computer Entertainment, Toshiba Corporation, and IBM formed an alliance ("STI") to design and manufacture the processor.
The STI Design Center opened in March 2001.[12] The Cell was designed over a period of four years,
On May 17, 2005, Sony Computer Entertainment confirmed some specifications of the Cell processor that would be shipping in the forthcoming PlayStation 3 console
When exactly was the PS3 supposed to be shipping before it got delayed? Spring 2006 or was theer any water that it might meet the 360's launch of holiday 2005? What exactly were they supposed to provide developers in dev kits for a GPU when a deal wasn't even signed yet? At least when a deal is signed to you can come up with the basic architecture and use a PC equivalent until real samples of the GPU are ready. Sony starts CELL planning in 2000, and doesn't even sign a GPU deal until 2005? MS signed up ATI back in August 2003.
Yet, today, America's leaders are reenacting every folly that brought these great powers [Russia, Germany, and Japan] to ruin -- from arrogance and hubris, to assertions of global hegemony, to imperial overstretch, to trumpeting new 'crusades,' to handing out war guarantees to regions and countries where Americans have never fought before. We are piling up the kind of commitments that produced the greatest disasters of the twentieth century.
— Pat Buchanan – A Republic, Not an Empire