We think of the Guild Wars franchise as the un-MMO, with all of the depth and social features you'd expect from an MMO but without the grind or the mandatory time commitments, and without the monthly fees.
Guild Wars 2 takes the instanced gameplay that allowed us to tell stories so effectively in the original and supplements it with a fully persistent world that provides easy opportunities to find existing friends and make new ones. It takes the flexible and customizable character progression from the original and adds new options, new playable races, and new personalized storylines. It takes the optional competitive aspect of the original and splits it in two, so that it's both more approachable for casual players and more of an e-sport for the hard core. It takes the unique skill deck system of the original and makes it more comprehensible, with a focus on quality of skills instead of quantity.
During the past two years of development we made huge advances to our game engine, adding a persistent world with free-form movement and exploration, day/night cycles, cutting edge support for dungeons and interior environments, numerous graphical advancements including support for more detailed environments and models, better lighting and shadows, new animation and effects systems, plus new audio and cinematics engines, a more flexible combat and skill-casting system, and so on. We also built an array of new content creation tools, enabling us to build a larger and grander world, bring it to life with a wide variety of events always taking place, create more unique and interesting adversaries, and tell stories more compellingly than we ever did before.
Heroes are born in the crucible of conflict and tempered in the flames of battle. Their deeds shine throughout history as a beacon of hope to those who must rise to defend the world in ages to come, becoming part of the legend of the land. The legends forged within Prophecies, Factions, Nightfall, and the Eye of the North will not be forgotten in the future world of Guild Wars 2.
Your deeds from the original Guild Wars campaigns will be commemorated in the Eye of the North expansion in your Hall of Monuments. The Hall of Monuments will reflect the achievements you earn in Eye of the North as well as those earned in Prophecies, Factions, and Nightfall. You will even be able to show off your hall to friends. Then, when Guild Wars 2 arrives, each of these monuments will correspond to special features your Guild Wars 2 characters can "inherit" from your own legendary past, giving you access to exclusive titles, companions , weapons, attire, and miniatures. These inherited items are unique: there is no other way within Guild Wars 2 to acquire them.
I don't think I've ever gotten the hang of GW. I walk in to a town and have no idea what's going on. I have a few quests, but no idea how anything else in the game works.