Well I dunno guys... I'm not blown away. The pixel density is fantastic for text and photos, but that's about it. Everything else is kinda worse than iPad 2. It does feel slightly sluggish compared to the 2. But bear in mind that I am someone highly sensitive to things like frame drops in games. Everything on this so far, even the initial set-up process when it pulls down the list of countries... felt like a slightly lower framerate. And pretty much every image on the web that isn't super high res looks worse. For instance, the NeoGAF logo in the top right there. And the Gaming/Off-Topic/Community tab surrounds... they have a softness now relative to the text because of the massive difference in resolution.
Only the Apple site looks right on this screen, because the images and text are all the same clarity.
It hasn't yet got to the point of feeling like it's struggling, but it's definitely not as smooth in many many situations.