An excerpt from another iPad 2 review
But the truth is that most of the apps weren’t slow to begin with on the iPad. The real key here will be what developers are able to do now that they know they have this second core and more RAM available to them. I suspect we’re going to see a lot of game-changing apps spring up on the iPad 2 that weren’t possible before. In fact, I’m pretty sure that’s exactly why Apple made GarageBand and iMovie — to show developers what they can now do. iMovie iPad 2-only (though it is available for the iPhone 4 as well). And they are awesome (again, more below).