when RC cars come out, id love to have a system that lets us create fully functional race tracks. like the ability to set checkpoints around the course, a start/finish line, record laps of each player and their times. then have a leaderboard project to a monitor or something so people can see who won. currently working on a race track to play around on, but being able to make an actual game out of it would be awesome. to add to this, an automatic respawn system for when you go out of bounds (my track is floating, and part of the challenge is not falling off the course, so not having to run down and grab your car is a must).
wouldnt have to be limited to the cars either. could be used for obstacle course races or something. people make platforming challenges in their condos too, so a time trial system where it records the time at each checkpoint for viewing would be neat.