Two more of these I've heard of recently:
Terrafugia Transition (folding wings):
BBC News - US company Terrafugia develops car with wings
Personal Air and Land Vehicle (PAL-V) (folding gyrocopter) :
BBC News - Will sales of flying car take off?
(not sure which thread to link with these - there is another thread
here )
The PAL-V is Dutch - so does that mean a slightly higher change of it reaching the UK?