Ridiculous, but ironically I think walking robots as self-relocating computers might be the most readily viable.
Small servers with console, PA speakers, field metrology or data acquisition machines, those things could have the lower torso or two for this and relocated as needed. The PhD guys can just park the truck and let those deploy wherever AI thinks >65% suitable for human use on their own, instead of users burning 15% of brain juice thinking and executing that. That would be immensely useful.
(also re: hotels that others are commenting, there were never technical reasons the door keycard readers couldn't ever had doubled as credit card readers - I think the reason why clerks are required is for sanity check, that the guests aren't in need of immediate safety/health assistance and ok to proceed to beds)