Gaming can go full circle with trends and concepts. Back in 1997 Ultima Online created a concept that allowed large groups of players into a digital sandbox to grow a fantasy world together. EverQuest picked up the ball and ran with it scoring a huge touchdown by taking the game from an isometric view into a third person view. After EverQuest the third person view became the norm and most MMOs went that route. There were exceptions, Runescape for example, remains hugely successful on the old school isometric model. I say old school, but I am honestly wrong in that regard.
Read more of Garrett Fuller's The Return of the Early MMO.