They have these at the Indianapolis airport now as concierges. I expect they will become very common and not scary over the next few years.
GTE (now Verizon) had these same type of “robots” deliver the mail to the entire building on every floor through automated scan paths located on the floor. They called for the elevators, they could be summoned for an express package, and they let you know when they were in your area for package/mail pickup and delivery.
That was in the 1990’s!
.... Yes, I understand that .... however Airport patron traffic areas are not as confined and less restrictive and therefore wouldn't hamper customer movement nearly as much as in shopping isles.
..... Also .... Maintenance of the bots would be a heckuva lot more expensive for Roaming Self Navigating Bots as opposed to stationary well defined informational Smart Kiosks.