Its not really new, and its not really powerful. From what I can see all this does is give you an estimate based on the square footage of your rooftop. There is a lot more that goes into a real estimate then how big your roof is, namely how can you arrange the panels to cover the roof. That is a neat trick and this company does that http://www.modsolar.net/

I worked with their stack for a bit and from my understanding their tool has been doing what this site does and then some extra stuff to actually get the panels installed.