It's basically a three way split. Bit hardcore games like Uncharted and God of War would have to go to the Xbox to still keep doing what they love, both with graphics and gameplay. Some lower down games would go to Nintendo to give them their fill, helping to resurface the gold castle on Mount Super Mario. Other's may just vanish into a void, never to return.
But as he said at the top, who know's what would happen if Sony games where to disband. The three main states that would happen are:
1: The investment into add-on's like the Playstation Move will be noted as a waste of effort.
2: Many major series (Ratchet and Clank, Killzone, Uncharted, God of War) will have to decide whether to move to Microsoft, Nintendo, third party games (App's, Facebook games) or vanish into obscurity.
3: The pressure against Sony will snowball further with more court cases, suing and possibly even Sony itself running aground.
Basically, if the PSN debauchery results in the Playstation becoming scraped, it will be very dark days ahead for Sony, worse days for developers to show their craft to the last two companies, and very bright but troubling days ahead for Microsoft and Nintendo, for they will be the only ones to fight against.