That's a work-issued device and it's almost certainly being used to answer a guest question like "where can I find XYZ," which that cast member wouldn't have been able to answer without the device.
Possibly. I can't tell if the second part of your post is sarcasm becuase of Telecasts. That is why i give the benefit of the doubt, but we had Telecasts for years for that reason. I am sure they are easier to utilize for some, but I prefer the Telecast for optics and guest service for the rare detailed question. Universal still does this method.