As for the question of what my son will or won't play with, I would not put this in the same category as Lego Mindstorm, home electronics test boards, home chemistry sets, etc. This is a game, a toy. It's not there for learning to program. What I was saying is that I'd rather my son, if he's going to play a game, play with something that is physical, not just something on a computer screen. I'm sure he'll be spending quite enough time in his life staring at a screen. If there's a game that allows him to have the fun of playing with the electronic device while still keeping him in the "real world", I can definitely see an advantage to that.
All of that said, the price is too high for me, at this point. Perhaps in the future, when their tech ages and becomes less expensive, the prices will drop so that it will be less of an upper-middle class + toy...