Pic 1 looks like some highly advanced shaders, possibly cryengine 3 (which is due out within the timeframe 2011 probably).
pic 2 is meh, looks like some static light maps...
pic 3 is also probably pre-rendered static light maps, but they want you to believe it is radiosity rendering (that takes at least a few hours to render on a fast CPU).
pic 4 crysis looks much better except for the raytraced windows.
Overall these pics are as faked as those dx10 shots of flight sim x which we saw in 2006.