It seems pretty similar to Ratchet & Clank (go figure), and those don't seem like system sellers for PS (I could be wrong). Plus it's not anywhere on Amazon's top sellers list, so my guess is No, not a system seller.
For those who think MS is not pushing this game: the last few movies I have gone to have all had an Insomniac featurette on Sunset Overdrive in the previews. Don't know how much that costs, but it can't be cheap. I don't go to the movies all that often, so this would be over the last few months.
Me? I used to really, really like Insomniac - Resistance 1 was a system seller for me. And my kids loved Ratchet & Clank. We bought everything through R3 and ACIT, and in spite of their schizophrenic tendencies to change everything between every game (at least in Resistance), they were all good-to-great games. But everything after that seems half-assed, and they now seem more worried about themselves/owning their own IP than creating good games. In the Overstrike/Fuse fiasco, they didn't even wait until the game was released to go schizo and change everything (it initially had me interested again). So at this point, I am more fatigued with their erratic behavior than anything else, and jumping from Sony to MS just seems like a lover's spat that is bound to end in disaster. I suspect MS wooed Insomniac away from Sony just to ensure they couldn't create anything for Sony in the meantime.
Just my $0.02.
