I am hoping that Titan will be an MMO that alters its environment based on the actions of the server. This isn't a new concept since WoW does alter environments with patchs and xpacs and GW2 has world events can manipulate the surroundings. I am imagining this concept taken to an extreme level. One where the actions of players and their guilds will shaped the layout of the Titan world to the point where individual servers are nothing alike.
Using Warcraft as a template, imagine playing on a server where Stormwind was destroyed by Deathwing; a server where the Scourge retake the Undercity; a server where Hillsbrad is still under Alliance control. I know they were time consuming, but events like the opening of AQ made you really feel like you were a part of a community. I think the next gen of MMO needs to make the environment and server just as much of a living, changing entity as the player himself/herself.
Maybe, "Titan" means that we will play as the god-like toons who shape the world around us.