While this does make some sense theoretically, I think that the increase in demand for energy even by the entire bitcoin economy is insignificant compared to the increased demand for energy in general and therefore will contribute very little in-and-of-itself to spurring on innovation in that sector. The main way that I feel PoW wastes resources is in terms of individuals - the electricity, hardware, floor space, time etc. they have invested in bitcoin could be being used more innovatively with the same return were they using PoS instead of PoW.