I think the anti-piracy angle is what attracts the game industry. Sony probably envisions a future where GTA XXV is released exclusively as a streaming service. Such a DRM-system would be practically uncrackable (unless you hacked the server or the server code was leaked). Customers would have no say in the matter. This is the main reason why the industry promotes consoles so much. Red dead redemption was never released to PC even though i am sure a lot of PC gamers would want it.