[ben_w]

For shopping, surely the best robotic option are the various things the huge warehouses use, rather than havingthan a humanoid going around a store meant for humans?

Both the things that look like Roombas and all these: https://youtu.be/ssZ_8cqfBlE?si=9mCtiKKkk_N9Uk7z

No single consumer would buy all that, but the retailers can.

[stubish]

The most overall efficient method is robotizing the store and deliveries, yes. Which a consumer is powerless to do. But if a consumer can buy a generalized household robot, it becomes cheaper the more tasks it can perform, amortizing the cost over the total work done. A generalized household robot will become practical when it becomes cheaper than hiring staff or carers. There is most certainly a market with the elderly and others requiring assistance for a robot capable of going around stores meant for humans.