I think the use of personal mobile devices can make many workers more tech savvy. Can the mobile device be used for good and increase overall worker productivity? Yes, it certainly can if a worker is involved in online sales. I may think that a worker is simply wasting time on social media, but the truth is that they are doing something very productive.
If people are more comfortable using their cell phone in order to get work done, then this should be the tool that is used. I think the finished product matters far more than anything.