News Halo Studio working on next-gen game

If the campaign is around 3x longer than Halo 3s, and works in more of the story from the books, then it will be an incredible game.. Why aren't 4-player co-op, online and off, and splitscreen multiplayer a standard for today's FPS games? The only reason my friends and I don't play CoD4 or any other shooter when we get together is the lack of decent multiplayer options.

 

The multiplayer thing is probably a tradeoff between nice physics / visuals and splitting that 4 ways I guess. Not really a hardware expert but having 4 players needing good physics processing off a 360 is asking for a lot. I dont understand why there arnt more PC local co-op games.