Fair enough, but even then I'd still argue there isn't any reason to expect to see less exclusive Vita games - I don't think the mindset will be so much "I have to make games that will also work on the TV with a DS3" so much as "I'm making a game that's for a primarily mobile platform that also has living room support" - unless the TVita ends up being some lightning success and becomes humongous before a DS4 bundle can come to fruition, but I frankly don't see that happening lol.
And I'd think the whole thing is more about getting developer support on the platform in general, not even just for exclusives, but just to make sure games in general have a reason to show up there. If devs can be convinced that it's worth porting stuff like mainline CoD and FIFA titles onto Vita (And I mean proper ports, not the things it's gotten in the past lol), then Sony would have a system with a really strong argument for a streaming media box + mainstream game support.