Warhawk:
http://www.youtube.com/watch?v=YRZnhv-ZFfY&search=GDC
Motor Storm:
http://www.youtube.com/watch?v=p6V0TC6kaks&search=GDC
WarHawk:
A beautiful display of power from the CELL processor using it's SPU's to calculate and process the individual raytracing effects. This is the first time in a LONG time that software rendering will be combined with hardware rendering to create awesome graphics. Instead of the engine fetching assets from the hardware render, the CELL renders it on the fly using preprogrammed calculations making action on the screen faster.
MotorStorm:
Another impressive demo, with the CELL rendering the particle effects on individual SPU's and the fact that the dirt is so interactive that it effects the tires suspension on the car as it rides over previously driven-on dirt with tire marks on it. And the demo of the bike spraying dirt onto the van with impressive detail and realism.
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These videos showed a lot of impressive abilities of CELL and RSX working together. Hopefully when we get to E3 and have playable formats, we will see them looking even better.