I think there will probably be a lot of niche, human staffed places. I worry though, that as robots close the gap, our collective baseline for cost will drop so low that $3 for good espresso will seem outrageous when the robot will churn it out for a $1, perfect every time.

Also, the chipperness is a lot less likable when you're friends with some of them and all they can talk about is how much they hate customers :( The unspoken secret of retail is that it's soul crushing to work in.