For new IPs - yes, without solid expectations of how a game will sell, and in this financial state of the industry, plenty of games like LBP wouldn't have been made if they were made multiplatform, since they wouldn't have the backing of a major company, both for development and advertising.
For old IPs - no.
Bet with Dr.A.Peter.Nintendo that Super Mario Galaxy 2 won't sell 15 million copies up to six months after it's release, the winner will get Avatar control for a week and signature control for a month.







