1. I was not aware that smart meters do not provide (near) real time data in the US. In that case your product makes sense of course.
2. Interesting. I have not considered that case before.
3. What makes you think so? Of course it's not simple but overall our results were positive so far. For example we were able to identify the exact movie being watched at any given time at one of our customers (https://134.147.101.39/media/nds/veroeffentlichungen/2012/07..., unfortunately only available in German).