Our future titles can be on whatever we please - we are a truly multiplatform studio now. Of course that doesn't mean that we'll be forced to make a port of every game to every console in existence... we simply have that option available to us.
Microsoft, however, will likely find a new development team for its racing franchise as the company has clearly it stated plans to keep its top-selling Project Gotham Racing exclusive to the Xbox 360.
This makes yet another beefy buy for Activision. Last year, the company acquired game publisher RedOctane's Guitar Hero franchise for a reported $100 million to strengthen its position in the music genre.