The thing i have been most impressed on hands-on videos have been the PureMotion HD screen with refresh rate 60 Hz, 332 ppi, Sculpted 2.5D glass, RGB, IPS, 2.5x faster scrolling and pixel transition speeds and super touch.
Jury is still out on the PureView camera. Specifications for the sensor do look very nice so i doubt it will disappoint anybody, but wont either have the image quality of 808 PureView?
8.7 megapixels
Optical Image Stabilization
Sensor size 1/3 inch
Latest generation BSI sensor with 1.4 micron pixels
Short pulse high power dual LED