A little robot called Budgee follows you around while carrying your stuff for you. That's all it does, but that's all it needs to do to be pretty useful.
It's got two wheels and holds a basket, and will autonomously drive after you while you walk around, whether you're shopping, out at the park, or doing anything else. It doesn't have any sort of fancy vision or navigation systems or anything like that.
You can talk to the robot using an app on your phone, and set basic parameters like follow distance (and eye color!). It can hold up to 22 kilograms of whatever you like in a basket. Also included are a bump sensor and cliff sensors, that's the entire robot. Simple and straightforward.