i don't agree that it's a smart business decision. it's greedy and cannibalises what they do. it means the exclusives mean less. sony do this with vita/psp ports of home console exclusives (uncharted, god of war, wipeout) and i think it's just as bad if not worse (on sony's part) cos sony are trying to sell vitas and microsoft isn't selling gaming hardware other than the xbox.
i think on that front nintendo has the right idea. they give their a-developers to both the portable and the home and you don't get stuff like pokemon on wii u cos it cheapens it. sony porting peace walker/liberty and vice city stories to every platform they could cheapened the psp exclusivity.