I've been checking those Crysis trailers on youtube too much and it convinced me as soon I am going to get my new computer, I am going to get that game. Looks so freaking amazing dont ya think.
It is going to be a nice showcase game but do not expect great innovative gameplay (as far as I can tell from all the ingame footage that I've seen). It will be like FarCry in that sense, although Crysis is better placed in relation to DX10 just been released so that it can demonstrate what can be done. When FarCry came out, DX9 had been around for a while.
I've seen a clip of a blast shock wave and that was just.... WOW. Personally I think btw that multicore empowered physics is bringing more to the gaming table than DX10 is but undoubtedly MS and others will say that DX10 is needed to get the most out of the visual effects that come with the proper physics modelling.