Getting to a cheap household helper robot requires building the expensive one. I don’t think Boston dynamics believes any reasonable consumer would buy their atlas robot, but by building it and scaling its production in industrial use cases they will learn things that make building a cheaper one much easier. And they will have built some factories to mass produce them. It’s not something that will be in everyone’s home next year, but sooner or later the robot hardware and robot intelligence will both be cheap enough to be accessible by average people (at least in the developed world)