Robots are no different than cars or trains or nuclear power stations, all these technologies pass through their initial development stage then settle into a economically viable form and very little fundamental innovation happens after that. Today's average cars are not that fundamentally different from a Model T. They could be, they could float on air cushions, they could fly! We certainly have the technology for both but we still roll over concrete and bitumen on rubber wheels because that is the economically viable level.
Look at the Japanese Shinkansen, an incredible safety record. Billions of passenger miles now and not a single accident. It's never even been late aside from earthquakes halting the trains. But it's not maglev, which it could easily be. Why? Not economically viable. The same happened with nuclear power station design, Space rocket design. Fundamentals we are talking about here, bells and whistles mean little. Elon's rockets cost just as much in energy terms to attain orbit, the chemical rocket is still a chemical rocket of 1945.
It doesn't matter if they can design a robot out of super light super strong metal so that it can fly across a beer garden and deliver your dinner, it's never going to happen because it would never be economically viable. I love watching SciFi movies, some of my all time favorites have robots in them. But I don't read the SciFi that modern engineering promulgates simply because I've watched 50 years of broken promises from that field, failed Mars colonies, failed flying cars, failed voice recognition offerings, failed autonomous vehicles for our roads. I could wait for that, like I could wait for fusion power, but neither is economically viable, obviously.
Why Americans still chat glowingly about robots and AI while the homeless and their feces is piling up in the streets and their cities are being looted by bands of impoverished youth mystifies me? Cannot we connect the dots? Successful technologies rely on either mass uptake at cheap cost (mobile phones) or they come in low volumes and at exorbitant cost that the average person can't afford (dental implants).
This is cheap and economically viable

This is not!

Bellabot $15,000

Honda Asimo $100,000

Guess which one will (is already) taking all the market share. And as they get cheaper to make they'll maintain market share. Just like gasoline powered cars and conventional trains. So don't expect to be served by a walking robot that places your meal in front of you this side of the next millennium.
We're 17 years past the peak now and the 3rd World is going hungry and dark. We'll be next, we're well on the way in fact.