This is going to seem like a bashing thread and I am sorry for that. I really hope GW2 does well, while I have my favourite MMOs I am not one of those people who fanboy's theirs over all others. That being said I just wanted to confront some of the hype and very high expectations of Guild Wars 2.
The main thing I hear is all this talk of how the dungeons and zone content will constitute enough endgame content. Let's consider three points about dungeons first.
1) I find it extremely difficult to believe that eight dungeons will keep people entertained for more than a short length of time. Sure there will be more at some point in the future, but over what time scale and how many at a time and how long are those meant to last? Many players are used to progressing from dungeons to epic raid settings with deep lore driven story and bosses out of legends, with gear upgrades to match. Now you will be running the same eight dungeons for an indeterminate but probably quite long period with only cosmetic rewards.
2) While there are features to prolong the dungeon's length such as story (hard) modes and the dungeons can be randomized in some ways, these will only serve to delay the inevitable boredom. Repeating the same events in a different order or slightly different path will not detract from the monotony of the same bosses, surroundings, events, etc.
3) Without gear upgrades there is very little incentive to keep clearing dungeons, once you've seen it, achieved what can be achieved and gotten whatever cosmetic items you need, what is the point? Furthermore, without gear upgrades you will eventually find the optimal method of clearing a dungeon... and then it's the same every single time. In other MMOs with gear progression your technique changes as you gear up. Initially you use CC, LoS pulls, and so on. Later you brute force it, and later still you chain pull wildly while the DPS try to balance running with AoEing. You won't get that in a gearless game, you'll find the optimal method and that's it.
Moving onto the dynamic world content, I struggle again to consider this to be worthy endgame content. It is somewhat like returning to Elwynn Forest and completing the quests you missed. Granted the Dynamic Events will mix things up so that it is different and the world feels more alive than a bunch of NPCs standing around telling you to kill ten boars, collect ten boar spleens, but in effect you are revisiting leveling content. I'm sure that people are going to cry 'But it isn't leveling content, it's all endgame content' or some such, but really it's going to feel like it did while you were leveling up, because it is what you were doing while leveling up. And, just like SWTORs story leveling experience, the novelty will wear off. There is a limit to how much ArenaNet will have scripted, and sooner or later you'll see it all.
All of this is not to say that GW2 is not without merit. It's combat system and graphics are a major step forward (though, TERA already has it beat, in both those departments, sorry), and I actually love the sound of the Dynamic Events that will be taking place continuously throughout the game as a method of leveling. The PvP sounds great because there will be no gear disparity, it will be all skill based, though I suspect that the complex interactions that are touted as a major selling point will be beyond the grasp of most PuG PvP groups. It's hard enough to get a battleground full of players to move as a group, let alone set up walls of fire and shoot arrows through them in a coordinated fashion. I also have reservations about ArenaNet's ability to deal with latency in the face of WvWvW scale battles, initial reports seem a bit mixed and honestly no MMO developer has ever tackled this successfully to my knowledge.
Ultimately I feel that this game is for the super casual players, by reason of it's very limited amount of endgame content, with limited replay value. Many of you right now are thinking 'of course it has no sub', and, 'hell yes, super casual - that's me'. A lot of you are dead wrong. You think you're casual, and by many people's standards you are. But believe me, many of the points I have raised above will come to haunt you and without meaningful endgame content you will become bored and (re)turn to other games. I honestly believe that it would take a truly casual player to find enjoyment in this game.
I hope this doesn't offend too many people and that you appreciate that I have managed to make a fairly logical post without turning this into a game vs game thread. Please respond in the same fashion