Wheels are cool but take a look at some of these projects. I think there is a need for something that can go over uneven surfaces.
They may have uses in planetary exploration some day. I think most of the explorers used wheels to get around so far.
Then of course there will be other uses such as new land vehicles that can carry equipment. Perhaps fire fighting, bomb threat surveillance or other applications.
Pay special attention to the last video. I think they have something there.