Hi Mike. Yes that is geothermal. Unless the resources are much greater than the geothermal industry estimates, for most of the world this wil remain a small resource. Not that it is not worth taking advantage of; every little bit helps. Australia is not the only country with large geothermal resources. Iceland is well supplied too.
The U.S. could I think get about 1/2 percent of demand from known economic geothermal reserves - but that is from memory and I could be overstating.