"Watching TV/movies while traveling (you can do it on a flight on a laptop, but it's hard in an airplane seat -- this is so much easier)"
I have a Macbook Air and even with that, doing anything on an airplane seat is a gigantic PITA. The iPad is a breeze. I wanted to upgrade to the 11 inch but now will upgrade to the 10.5. Definitely worth it, just for travel.