What's interesting is that it uses existing composite technology. Whether it can be manufactured economically is another question.
The designer has stated that it's as stiff as a normal bicycle, I am sure many would like to have a test ride to find out for themselves. Somehow, I think the suspension bridge like cables might have something to do with the stiffness of the frame.
He also states that it folds to a smaller package than the A-Bike.
It's obvious that we have to drop conventional materials used in bicycle construction to get the weight down for a folding bicycle. I wonder how many years it will take though.
I heard carbon nanotubes hold the key to producing composites up to the job. It has already been used experimentally in a carbon fibre bicycle frame. As stated in Wikipedia:
"In 2000, a multi-walled carbon nanotube was tested to have a tensile strength of 63 GPa. In comparison, high-carbon steel has a tensile strength of approximately 1.2 GPa."
http://en.wikipedia.org/wiki/Carbon_nanotubes
I read somewhere that they should be able to produce a composite with a tensile strength over 100 GPa.