I don't get it really, so many useful things.

Applications of Lucid Dreaming in Sports
Applications of lucid dreams: An online study | Melanie Schädlich - Academia.edu

Plus a few studies that Tadas Stumbrys is working on.

Either way, I have gotten over fears using dreams, and quite often use them to study as it not only saves me time, but gets me rested while studying. Whenever I take the time to study in a dream, will get relatively high notes, as opposed to regular or bad notes when not studying in a dream.
Also used it to get over the taste of garlic once.
Also for improving reaction time, which I was very bad at. Thats saved me of a few major lessons already, without ever doing sports or the like. But thats just my interpretation.
I will often try stuff I can't do in waking well, and have gotten slightly better at violin playing and drawing, though I didn't try for long with either in dreams, but still saw the improvement. While working on those two stopped waking life practice, and still improved. The thing I got best at was dealing with pain, considering how much of a crybaby I am, after experimenting in dreams can resist pain much better than before.

So many things to work with, so little time, so little interest.