With Guild Wars 2 they are trying to break the mold and kill the grind.
There is no pay to play after the initial purchase is made.
I see it as Guild Wars/Dark Age of Camelot/Everquest II combined.
Will have dungeon crawling and overland maps.
Has in the past had good PVP so you can casually play or competitive.
They are trying to fix all the problems with needing healers etc.
No kill stealing or locking encounters (real interesting). I quite like that idea of being a nomad and just picking up a fight if I see one happening. Noone will miss out on loot if you assist either. Its really co-op to the extreme.
I dunno if its going to work. In current MMOs I do find a few people dump you because of your class. Its annoying but if your a solid player you get a spot on your reputation. Be interesting how a team works where everyone is important.
The game is pretty cutting edge in other areas. FPS components in an MMO!
Check out the video.
Guild Wars 2 Pax East Panel: Guild Wars 2 (PC) - GameSpot Video