I remember the last time they tried this and what a complete waste of time and shambles it was.
After using it a few times, most of the pilot group seemed to think that having no human contact at check-in was something some very cheap chain-motels do (credit card access to lobby and room) well, but not something you wanted from a full-service hotel when you are paying a full-service price.
Last time I originally liked the idea, but soon came to the conclusion that a fully-staffed and well tranined reception with no demarcation between check-in and check-out/cashier was by far a more satisfactory arrangement.