Basic principal of a MMORPG is:
Massive multi player.........check
Play a character and increase their stats thru XP..............check
Interact with other players........................check
play in a world with other players.................check.
aquire wealth and items................check
MWO has all of the above, you play a pilot increase their skills and your character gets better at what they do, similiar to WoW, WAR, SWTOR, AoC etc.....no difference, just that it is in first person mode.
Planetside and Battlefield are FPS. Do not increase stats, jump in at any time and play a match, log out character resets.......that is the key...character resets.
Regardless how you want to spin it, MWO will be and is a MMORPG.
Edited by Wolv e, 12 July 2012 - 07:45 AM.