Be easy to do if you just had it tethered to you so it would follow the tether, but without you having to actually pull it. It stops when the tether goes slack. Then goes in the direction the tether got tightened in when you're ready to move again. Power goes to the wheels in proportion to the tightness so that you aren't actually pulling it along, it's just following and adjusting its speed to yours.
Almost anybody could block-design a system to do that in about forty minutes. Excluding pencil-sharpening time.
Easy peasie and cheapie neapie, but no, that wouldn't be high techie and remotie controllie and gewgawie enough, so I guess that idea wouldn't float.
Terry