For those getting excited, It doesn't "boost" gaming performance. It prioritizes the game over the background process (in this case, a kernel being compiled.)
Schedulers aren't magic. As pointed out in the comments of the linked article, there are other ways of doing this. The more interesting tech here is being able to choose between schedulers under specific workloads, which is very nice IMO.

Does a scheduler impact power draw? Maybe you're confusing this for a CPU governor perhaps?
And yes, the underlying tech here is user-configurable schedulers. Very neat.