for example, add in a counter-balanced two axis tilt system and make a bike-powered starfighter game.

for bonus points, make it a tandem rig, where the guy on the back operates the guns and shields (pedaling to power them of course)

Better yet, make a open-source vr bike rig setup and API, then allow people to start making their own games

set up a gym around the world full of those, and let people compete for glory while exercising!

I have seen videos of 2-player bike racing games hooked up to exercise bikes. Looked fun

I will not rest until the skies of EVE are filled with pedal-powered spaceships!