Sweet. . . depending on price. So if I bike to the grocery or down to a farmers market, I don't have to lock up the bike but can take it with me. (A good way to reduce the chance of theft is to have your bike in site.) I wonder if the buses would let me take it inside, or if I'd have to keep it unfolded and outside?
Heck, when my mom was younger she could of used one of these. She had to lug boxes of paperwork around for her work, even after a back injury - so being able to push cart them around would have been helpful.
Overall, I can see a lot of uses for these. Unfortunately, I don't see many stores catering to a transformable bike that may have mucked-up tires.