Every big company enters to video game. Before Sony entered to game with Playstation. And even after the death of Dreamcast Microsoft made complete rip-off of Dreamcast.
Well why not ? Many user would still be playing on PS3 while PS4 is out on the market. Let say PS4 is out now and GT6 is available for PS3 and PS4 then GT6 on PS3 would make more sales and quicker while GT6 on PS4 sales will have a slow start.
Finally, It is not Always Online. If it was and owning, when my Internet Stops, this would happen: ---------------------------------------- Muahahaha, You can't because you do not having online connection to M$ ----------------------------------------