Guild Wars 2 : Will the levels/game run out 3/4ths in?

Guild wars 2 has a bit of a different leveling format, apparently.

The thing was, I was kind of put off in guild wars 1 by getting to top level before the story ended. Indeed, I stopped playing - not out of rage, just lack of draw.

Before that point you could go out and pretty much do anything, including followng the story, and you got XP, which meant more power, or atleast some edge. It was a reward mechanism.

Then that got taken away entirely UNLESS I went out and hunted specific elite skills and things - ie, I couldn't do what I pretty much wanted and be rewarded.

So I had PVE fights which IIRC, didn't feel like I did much toward the outcome, and no reward for doing them except to see more of the story which...isn't game. I'll read a book if I don't want any game with my story.

So will they run out of levels, or more specifically, the ability to do pretty much what you want and keep getting rewarded? Will I top level about a three quarters and then only specific activities will garner me anything and doing whatever will result in nothing much in game terms?

Levels aren't exactly a great mechanic to begin with - what's the point if you go from +1 to +2 to attack if the monsters go from +1 armour to +2 armour at the same time? Not alot. But even with a shaky reward mechanic, if it runs out, jeez...