Lightning Rods
Lightning Rods need to be high to work. Oftentimes, they also aren't aesthetically pleasing and need to be there all year long. Instead of using traditional lightning rods, we are now capable of creating so-called laser lightning rods. Basically, being able to redirect lighting using a laser.
It only needs to be on when a lightning storm is occurring. Range just became a much smaller issue. They also sound awesome.