Laser tech could drill holes in days versus years and reduce the cost of building a geothermal plant in half. It would cost $500,000 versus $30,000,000 to dig the same 10km 8'' hole with the laser versus the mechanical drill, respectively. While currently a geothermal plant is 4x that of a solar farm, if this could cut costs in half or better, then geothermal could be another cheap form of energy that could be even cheaper than solar and wind (currently). On top of that, geothermal could replace coal and nuclear as a major source of sustainable energy that doesn't fluctuate like wind and solar with the weather or time of day. Check out the video: