I loved seeing the joy on that boy's face!
I couldn't finish watching it because it started sounding like an infomercial for the iPad. in my opinion technology in general does the same thing. Teachers and parents just have to think to use it. I remember walking into son's kindergarten class (before diagnosis) and seeing a boy glued to a computer. He was visibly autistic and I was told that he was already proficient.
Yes, for non-verbals, specific apps would be necessary, and $200 for such an app is a small price to pay for the ability to communicate. For other stuff, learning, teaching, interacting, our technology is just exploding. Just need to find the right format for the right child. AND in my opinion, It does NOT have to be the iPad.