This excites me. If they become common, people are going to spend a lot of time exploring the world -- an antidote to sitting behind your laptop all day.

These things would make great pack animals. When you go hiking, you'll be able to toss your gear into one of these things and have it trot along behind you. You'll be able to take more risks because robots will be able to rescue you from tight places. If you get tired or sick, you'll be able to ride them.

It's funny to think that the streets of San Francisco in 2100 might superficially look like a town in a developing country. ("Oh, those aren't mules in the street, they're robots.")