I don't know anything about home robots, but to me this seems to be the first design that is practical to bring to consumers. Not 2 human arms (or even legs) and some expensive face, but instead just a Roomba-ish base, telescope arm with grabber that moves up and down, camera on top.
So I'd guess that with sufficient volume this could get down to the $5k mark.
That said, I doubt this bot will ever make it to the stage of being a consumer bot. The sorts of problems that need to be solved are on the scale of that of autonomous vehicles, probably even harder.
Universal Robots are popular for research, and from what I heard start at around $30k.
KUKA LBR iiwa is more like $100-200k.
Having worked with robotics in mfg, part of the cost is stiffness. A stiff arm and mounts means repeatable actions.
In the video this thing was flexing all over the place. It’s cool, no doubt. But it seems a well placed LEGO could nearly shut it down.
I’m not seeing 18k as “cheap” in any sense here. Maybe I just don’t understand the business model or what goes into this.