Taking energy from the floor is a great concept. Other companies in the market are trying this as well, ranging from club/disco floors, to enhancing football (soccer) field with such type of 'floors'. The performance seems to be the issue, well, the performance/cost ratio. But I certainly hope this technology can become cost effective. The aesthetics of the Pavegen v3 I think is pretty cool; I certainly like the way the path looks in the photos above.