Comment by oersted

You are right that most are not very good, but it's more because of business reasons than technical ones. It's more costly and bulky to keep remote coffee machines supplied with fresh milk or cream, as well as other extras, and keep it all well refrigerated. Most people do not seem to be ready to pay extra for it.

But a robot barista in a coffee shop would end up being exactly like normal coffee machines that have been around forever, perhaps just a bit higher-end than an office one. It's not really an idea like OP was implying.