I have posted previously about the tugs that get used at airports to push back the jets when they are departing. The big tugs with a tow bar are common in the US. You also get the ones that pick up the nose gear and push from there. While sitting at Heathrow waiting for a flight, I watched their latest approach. These are remotely controlled devices.
They also grab the whole nose-wheel and have a capture device that wraps around the tyres to hold tight. By the looks of them, they are electrically powered so will be recharged when docked somewhere presumably. The operator walks alongside them as they move across the ramp and when moving the planes. It doesn’t seem that fast compared to a normal tug and clearly it still has an operator. However, it looks like a cheaper unit to buy and operate along with lower emissions compared to a large tug. I assume that is why they make sense. Here is some video of them dispatching a jet.