Zwift is a new internet connected training system.
My favorite triathlete tech blogger, DC Rainmaker reviewed the Zwift system.

http://www.dcrainmaker.com/2014/09/ultra-graphics-trainer.html

It’s the logical conclusion of the gamification of trainers and the Internet of everything. You load your bike on a trainer, you connect your Garmin senors, fire up your computer connection, and beat your friends from around the world on simulated courses from around the world. It’s awesome for those dark weekday nights in winter.

Not exactly MarioCart yet, but soon. Ray tried out the system during Eurobike week; he was riding with folks simultaneously in London, NYC, and LA.