http://www.youtube.com/watch?v=1naDvJV3ueg
I like the way OX-Peco folds and unfolds.
It is easy to roll such a folded bike on a platform
and inside a Tram/Train/Bus Mobiky has same thinking
that one can roll with wheel inline instead of them parallel.

I am a dreamer so my wishful thinking would combine
a folding bike with a Rollator that way one could walk
where one are not allowed to have even a folded bike
and then unfold the Rollator into a unfolded bike when
outside of that Shop or no-go area for bikes.

so two way to fold first the Unfolded riding Bike -
then the Walker Rollator with seat - finally
the fully folded BikeRollator package