The fanbase is way too small and the efford thats needed to show what the ps3 could do with Crysis 2 ( that would be a game that looks about 10% better than the 360 version) would take too much development-time that wouldnt pay off. Thats why they focussed on the 360. I must admit though this general "News-blockade" thing Crytek is dealing with... causes much anger... and thats not really necessary.
Throwing little pieces of meat at us like dedicated servers announced or pc demo announced doesnt help much. The best thing would be a "show what you will get" trailer for each platform.