For you golfers in the crowd, you may be soon using one of these as spring is quickly approaching.
Shadow Caddy is a robotic caddy that follows you around the course, carrying your bags just like a human caddy. Set your bag on your Shadow Caddy and off you go, free to concentrate on your game without the distraction of dragging your clubs around. It has two settings, follow and park.
It is completely hands free. It follows a small transmitter attached to your belt. It has a sophisticated detection avoidance system which prevents collisions with other carts, people, trees, etc., then picks up the transmission and goes right back to following the game. The Shadow Caddy will also carry drinks, sand buckets, etc. Another good feature, no tips required.
The caddy has been around for a while as a rental on selected golf courses. Here is a LINK to watch it on YouTube