I did my usual every-now-and-then keyword “piano” search in my MythTV. And I found this Stashway foldable grand piano (more info and video) invention on the TV show New Inventors.
Basically it’s a normal digital stage piano, fitted into a specially designed portable foldable stand which looks like an ordinary grand piano. What’s funny (to me) also is its foldable legs design is somewhat similar to how my mini grand piano music box folds its legs. The folded piano part is light, and can fit into a car (wagon). It even has wheels for easy moving.