Water is non issue since it doesn’t have to be too close to generators. We kinda figured out how to transfer electricity where we need it.
Transporting it is a small issue but we’re already transporting a lot of liquid gasses and other flammable stuff like gasoline.
If nothing else it could be used by millions of semis for which current battery tech is absolutely fucking useless and likely will remain that way for decades.
But really if we didn’t jump on completely wrong tech years ago and just switched to hydrogen instead of batteries, we would have cars with zero emissions, zero range issues and zero charging problems a decade ago.