Heres my 2 cents. 

Guildwars 2 will not achieve the success of WoW. As the thread titles questions. GuildWars 2 has been made already. It's called Darkfall. Though reputation, publishers, marketing all play a part. So GW2 will be more successful.

Rather than go on that GW2 doesn't offering anything you can't find else where. I will go on to say instead. that GW2 looks like a good conglomeration of many aspects of RPG's that have come before. I'm sure GW2 will do well.

Why will GW2 fail like other MMO. Why it won't be a WoW killer. I know it's hard for many people to understand(no actually it's not). But GW2 already failed based on the video link. Why? because 99% of what the developers talked about were focused on 1 aspect. "Our product is cool. Play our Product. Our Product is great". That's why GW2 will fail. That's why Conan, Warhammer...... all fail. They try to take WoW and top it. Sorry FAIL.

Why EQ and WoW succeeded.
Verant Entertainment when they developed EQ remade classic MUD like experiences with 3D graphics. This offered a NEW EXPERIENCE that had never really been done before. Once EQ built it's user base no other EQ clones(Asherons Call...) ever succeeded as much. Verrant got lucky. They didn't understand why they suceeded. That's why EQ2 got stomped so badly by WoW.

Blizzard is not a company that makes games for the sake of something cool. Blizzards games always succeed because of something that other companies just don't get. Blizzard games are made around the gamers behavior. That's why Blizzard games are "easy to learn, hard to master". They was to encourage people to get in with easy rewarding game play. But invest their time over a long period of time by slowly increasing the skills of the player. So that they are encouraged to keep on playing.

WoW is built on Player/Consumer behavior. If you could find many of the old interviews. You will find that many of their game development choices are based around the gamer and their play habits. This is why WoW succeeds where other WoW clones fail. The other clones think they can flap their wings and fly. Rather than understand the nature of aerodynamics and flight itself.

Why GW2 will not be a WoW killer and end up in obscurity. Simply put listen to the video. All they ever talk about is the game and not the people. Hmmmm anyone ever remember the early Nintendo discussions about the Wii? they talked about the people.

However from a gamer perspective. I can easily see that the GW2 design being superior. Though much of that is built on the backs of other games since WoW release. However. Even before WoW I always wanted to make a computer game with a dynamic living thriving world. Where the actions of the players would dictate the outcome of areas. Those choices would then shift nearby areas and continue to down the road. GW2 sounds like it may have that. So I WILL by this game. I will LIKE this game. But I think it will not be a WoW killer. Sounds like this game was built for my attention.

Heres my 2 cents. 

Guildwars 2 will not achieve the success of WoW. As the thread titles questions. GuildWars 2 has been made already. It's called Darkfall. Though reputation, publishers, marketing all play a part. So GW2 will be more successful.

Rather than go on that GW2 doesn't offering anything you can't find else where. I will go on to say instead. that GW2 looks like a good conglomeration of many aspects of RPG's that have come before. I'm sure GW2 will do well.

Why will GW2 fail like other MMO. Why it won't be a WoW killer. I know it's hard for many people to understand(no actually it's not). But GW2 already failed based on the video link. Why? because 99% of what the developers talked about were focused on 1 aspect. "Our product is cool. Play our Product. Our Product is great". That's why GW2 will fail. That's why Conan, Warhammer...... all fail. They try to take WoW and top it. Sorry FAIL.

Why EQ and WoW succeeded.
Verant Entertainment when they developed EQ remade classic MUD like experiences with 3D graphics. This offered a NEW EXPERIENCE that had never really been done before. Once EQ built it's user base no other EQ clones(Asherons Call...) ever succeeded as much. Verrant got lucky. They didn't understand why they suceeded. That's why EQ2 got stomped so badly by WoW.

Blizzard is not a company that makes games for the sake of something cool. Blizzards games always succeed because of something that other companies just don't get. Blizzard games are made around the gamers behavior. That's why Blizzard games are "easy to learn, hard to master". They was to encourage people to get in with easy rewarding game play. But invest their time over a long period of time by slowly increasing the skills of the player. So that they are encouraged to keep on playing.

WoW is built on Player/Consumer behavior. If you could find many of the old interviews. You will find that many of their game development choices are based around the gamer and their play habits. This is why WoW succeeds where other WoW clones fail. The other clones think they can flap their wings and fly. Rather than understand the nature of aerodynamics and flight itself.

Why GW2 will not be a WoW killer and end up in obscurity. Simply put listen to the video. All they ever talk about is the game and not the people. Hmmmm anyone ever remember the early Nintendo discussions about the Wii? they talked about the people.

However from a gamer perspective. I can easily see that the GW2 design being superior. Though much of that is built on the backs of other games since WoW release. However. Even before WoW I always wanted to make a computer game with a dynamic living thriving world. Where the actions of the players would dictate the outcome of areas. Those choices would then shift nearby areas and continue to down the road. GW2 sounds like it may have that. So I WILL by this game. I will LIKE this game. But I think it will not be a WoW killer. Sounds like this game was built for my attention.

The thing is, nobody said anything about a WoW-killer. The OP talks about GW2 being the much better game, but that won't necessarily translate into sales and/or success in the market.

And Guild Wars 2 won't fail (unless your criteria for success is to beat WoW in userbase), it's seeing pretty substantial hype, and if you're gonna base your prediction on that video alone, you are foolish. ArenaNet are actually using a strategy kind of similar to Nintendo's, they are focusing on fun first, and that's why they are changing up the gameplay as much as they are. If you had followed the game, you would know that that's why the game doesn't have a dedicated healing class, has very little death penalty and has true cooperative gameplay, just to mention some. As they said in the video "The most important thing in any game should be the player, we have built a game for them.".

Guild Wars 2 is focusing more on the players than any other MMO in recent years!