What has made me go "Wow!"
- it can read my handwriting and translate it into text
- I can take notes with my own writing...which lends it a more personal feeling to the user
- the large screen size and pressure-sensitive stylus make this a winner for anyone in graphic design or who enjoys drawing (try SketchBook Pro if you are serious about drawing - it's worth the $5 ... otherwise for one of the many free apps out there)