There are tens of millions of security systems in businesses and homes that have wireless modules in them that all use 3G to communicate with their security monitor centers. I would not expect 3G to go away any time soon. There will always be a push by the carriers to increase the speed of their networks. It's the competitive impulse that keeps them acquiring new frequency spectrum. Already Verizon is deploying "Advanced LTE" and many Asian countries have real 4G with 100 MB speeds. Unfortunately any product we buy today that uses the Internet will always have a level of near term obsolescence built in. However, with Tesla's capability to do firmware and software pushes, there should always be an upgrade path.