Like Frank, I like to travel and when I do I need my MacBook Pro, iPad, & my iPhone4S to keep me company. When had to fly back east a few weeks ago I had to go for business an being a frugal kind of guy I could not afford the better seats in the front. I was lucky enough to be on a flight that had free wi-fi.
Wi-Fi is a huge thing for me as I need to have it fast and I expect it free on a flight. More and more places are offering free wi-fi these days as a way to lure customers. Most of us have a data plan that hammer us for going over. Having a mobile hotspot with us can reduce the chance of us going over.