Agree, you need something like the below to make it work, but it'd be a revolution in transport! http://www.bike-intermodal.eu/

Note that the A-bike falls into this territory, bar the tiny wheels http://www.abikecentral.com/index.html

Edit: I'd forgotten about another type, the monowheel, though they do require some skill: https://www.airwheel.net/home/product/X5