Comment by jac_no_k

Partly a reality for cyclists.

http://www.tacx.com/en/products/trainers/i-genius-multiplaye...

http://www.cycleops.com/en/products/software/virtual-trainin...

http://www.minoura.jp/english/trainer-e/option-e/cogmon-e.ht...

Cycling on indoor trainers is boring without some sort of incentive.