Regarding flying bikes:
Seeing as airplanes were basically invented by freakbikers who were told it couldn't be done (no better way to inspire someone to build something), it seems only natural that bikes progress into the water and then into the air.
I have some friends who were commissioned to build a pedal-powered blimp for Burning Man. However, they discovered that no amount of pedal-powered propeller action could sway the blimp from going whatever direction the wind wanted. So they just dropped the pedal-power part.
Naturally, the next step is pedal-powered spaceflight. Why carry food AND fuel when the two can be the same thing?