Looking forward to the death of pointlessly enormous, low-pixel-density displays.
So many of today's computing tasks can be achieved more efficiently on a modestly sized display with a higher pixel density.
If I have to use a PC I use chrome so Im glad that the unified entry bar is coming to safari. I wonder how this will translate to OS X since the on-screen keyboard for URLs is different to the one for general text entry (ie [ . ] [ / ] [ .com ] instead of spacebar).
The screen alone is a monumental update.
The processor gain probably won't be realised because of the increased graphics demands but it the update will be nicely rounded out by Siri and better camera optics.
I'd be more likely to consider cosmetic and form-factor changes as insignificant updates. The iPad 2 was a notable exception in this regard because the rounded back of the iPad 1 was completely fugly, unnecessary and impeded function.
Id like to see the new chip for Apple TV allow for an App Store with the complete console experience.
I hope this update is not just about a spec bump to 1080p. How would Airplay mirroring even work now that iPad 3 is getting the retina display?