Someone mounted a WiFi LaserCube to the handlebars of their bike and linked it to a GPS app on their phone to draw a directional arrow and "distance to destination" figures on the ground in front of their bike. It made the front page of Reddit today.
https://old.reddit.com/r/nextfucking...gps_on_a_bike/
While in theory this is a cool idea, in practice you've got a 2.5 watt laser projector mounted at waist level on a moving vehicle... (shudder)
Adam