The problem is a lot easier that driverless cars (everything is slower and a remote human can take over in hard places) and huge potential to shake up the short-to-medium distance delivery business. It's the sort of tech that could quickly explode into 100s of cities worldwide like escooters did a couple of years ago.
Starship Technologies is the best known company in the area and furthest advanced. https://www.starship.xyz/
The damn thing made us wait for what felt like an eternity. And it still didn't move. So I started to roll forward and I swear to you, I was almost hoping I would hear the crunch of electronics if the thing had decided to roll forward given I had given up on it.
A year ago I was in a Bevmo trying to get beer and an inventory robot was in the isle. The thing was bulky (morbidly obese?) and I couldn't get by it as it was rolling slowly up the isle taking pictures on both sides, so I went down the parallel isle hoping to get infront of it to get to my beer. Nope, the thing got there first and blocked me.
Robots are our future. And it will be annoying during our lifetime. There was a reason Han Solo snapped at C3PO to shut up. I don't know what Han has had to deal with in his lifetime, but I can take some guess now on where his "shoot first" mentality came from.