GTRacer writes: Forbes reports that Hilton Worldwide, international hotel operator, is rolling out smartphone-based guest tools allowing self-service check-in, access to a virtual floorplan to select a room, and (in 2015) actual door access once checked in. The author states the drive for this technology is the growing influence of the swelling ranks of Millennials, who "[...] have a very strong inclination toward automated and self-service customer service." The security risks seem obvious though "Four Seasons Hotels and Resorts [is] working on using the same, or a similar, system soon–and Four Seasons is nothing if not secure and discreet."
Computers are unreliable, but humans are even more unreliable.
Any system which depends on human reliability is unreliable.