Even if it does work as claimed, is this any less unwieldy than pushing around a regular bicycle?
For those of us who live/work in a city with an underground/metro system then yes. Normal bikes aren't allowed on all lines. A folding bike is (it is small enough to count as luggage). However the Brompton is smaller (when folded) than this bike (it has smaller wheels) and is already established as the best commuter folding bike.