You've seen conveyor belts before, most probably at your local airport ferrying beaten-up luggage in circles, but for some reason the same tech doesn't seem to have been applied to people yet. Leave it to City University London prof Jack Levy to correct that oversight with his eponymous Levytator -- an escalator that follows freeform curves (but not convention!) and offers a better "cost per usable step" than your typical moving stairs. Patented in Europe, the USA, and even China, all this thing needs is the gentle push of a kindly investor -- see the video after the break to determine if it's worth your cash.[Thanks, Conrad