I think Microsoft is at risk of struggling for exclusives - the biggest problem is that EA now own BioWare and Activision accquired Bizarre. I don't we'll see another exclusive Project Gotham and I can't see EA keeping Mass Effect exclusive to the 360, timed could be possible.
The money Microsoft have to offer now to justify 360 exclusivity is just becoming too high imo, and with a limited first party I can't see them producing many exclusives by themselves.
2009 could be an interesting year, personally I see Dead Rising, Mass Effect, Project Gotham and Ninja Gaiden all heading to the PS3 in some shape or form, some maybe only be the next in the series's as oppose to ports of the previous titles.







