The whole focus on virtual biking is cool but needs some alternative. Perhaps, there could be game where resource utilization/timing is based on wattage output or FTP % and you have to allocate your watts to power in-game resources. Of course, using the bike to navigate would also be part of the game. Di2/eTap buttons could be reassigned to game functions. Longer term, I wonder if the more complete bike-trainer solutions (e.g., Kickr Bike) will become larger markets and if those types of devices will become better suited to new virtual biking alternatives.
Anyway, there is so much more potential than just Mario Kart, although that would also be awesome.