I've often thought that self-balancing tech could make powered unicycles practical (moreso than the few attempts we've seen so far). I don't see why pogo sticks shouldn't join them! :D
I would say there's more than a "few attempts" at powered unicycles - it's an entire industry, complete with expensive brands, cheap Chinese offerings, enthusiast forums, and listicles with titles like "top 10 electric unicycles to buy in 2019". The design has pretty much converged now.
I was considering getting one for my daily commute, but a part of me fears that no matter how skilled I got with it, riding over rough ground would still be a risky business. One pothole and your face is in the dirt. What would you change about current EUCs to make them more practical?
All of the ones I'm aware of balance front/back only, and still require quite a lot of skill to ride. I want to build one which can steer the wheel (using the mass of the rider as reaction mass) as well as spin it forwards/backwards, and so it can fully balance itself and rider.