I can think of one place where I don't want the experience of "being served by a human". McDonalds. It would be fantastic if there was just a touchscreen by the register. Even if the cashier was standing right there to take the money. I can't count the number of times I've spend 4 minutes saying "Chhiiickeenn MC-Nuuuuuggeets" as slowly and clearly as I can to a person standing right there, only to get a McChicken sandwich in the bag.
Don't even get me started on the drive-thru.