Very good idea. I think it's interesting to see what effect this has on a family outside of the regular computer vs real world thing.
The dialogue moves like a screenplay though. Did you mean that intentionally? If you'd like it to be more like prose, I suggest something other than one set of quotes after the other.
I'd be interested to see more, however to maintain interest for Tron fans it will have to, at some point, tie into the whole Tron universe more than this being Thorne's family.
I'm assuming you mean to do that, just saying's all.