The screen is very sharp, it's almost as fast as my 2012 MacBook pro, and the battery is a trooper.
Oh, and the shift from the iPad 2 form factor to the Air is amazing. I came from an iPad 2 any I was amazed by the size and weight.
I picked an iPad Air 2 for my wife last week to replace her iPad 3. She had the same sentiments as you did. I would add that the speed boost is a big improvement, no lag on any of the apps. Plus the Touch ID is so convenient!