depending what they mean by 'MMO' it could be interesting.
Planetside 2 looks really darn good and that's an 'MMO sci-fi FPS." Instead of joining matches that last a couple minutes, you join a persistent unending war. You can drop in, see fellow soldiers going after a base, help them, and leave without worrying about w/l ratio or finishing the match. Dayz is similar in a way.
Or maybe like Dust 514. I'm not clear on how that plays out, but it sounds like it has Battlefield-size matches playing into a larger war on the EVE side.