There is a lot of activities around “high temperature supra conductor” high temperature meaning using liquid nitrogen as a cooling fluid. It would already be less a hassle than liquid helium. Some do exists, and the question that interest every industry using supra-conductor is whether the cost saved by switching to liquid nitrogen is worth developing a whole new product with a relatively recent technology.
Room temperature would be a massive breakthrough as suddenly you don’t really need to deal with a cooling system (or may-be a water cooling/fan like any other electric equipment) not only it would ease the life of people aready using super-conducting materials but it would also allow to use it in more cases (Maglev, electric motor)