I suppose this is good and bad news. The game isn't schedualed (or wasn't) to be released for a few months anyway, so I'm sure the PS3 could have had it out (and looking awesome).
Whether or not the 360 is at fault this time, it's bound to happen down the road.
Call me a PS3 fanboy, but I think the more and more developers experience with the PS3, the more they will like it.
I think it's a matter of change that is what is holding the PS3 back now. Once all these PS3 exclusives come out, we should see a lot more games (exclusives or not) going to the PS3.
Now, all I need is to get one.
