The alpha devkit was using 2 Geforce 6800GT in SLI, the new one uses the G70 
- Killzone was in-game engine running at 5fps to 60 fps on the alpha devkit 
- I-8 and Warhawk were realtime on the alpha devkit 
- GT vision was just a hi-res GT4 engine, its just a tech demo not the final game 
- They were forced to changee controller because of the copyright lawsuit .