As far as I'm concerned, airplane passengers should be forced to wear muzzles from the moment they sit down, and communicate their meal or beverage preferences with the flight attendants through morse code blinks or sign language. I have a job most people find interesting, and if I don't close my eyes and pretend to sleep or stick my head in a book as soon as I sit down I'll spend the entire flight answering inane questions about it.
That said, there's absolutely no reason why airplanes shouldn't be able to offer in-flight wifi, and people can use their phones to connect to it. Just make sure if you do this, that you turn off your cellular antenna or you'll drain the battery very quickly.
And, hopefully, airlines opt not to offer in-flight cellular, or if they do, it's prohibitively expensive. I'm sure there's going to be people using skype over data, though. But honestly, who even talks on the phone anymore? Just send a text, or an email.