People think the collapse of the Net will be one catastrophic event, but it won't. It will be like the collapse of a sewer line. At first you don't mind dumping several gallons of Drano down the pipe. But when the Roto-Rooter man offers you a volume discount, you know it's time to call the plumber. To increase the bandwidth so to speak.
People are already dissatisfied with the performance of the Internet.
As the performance deteriorates further they'll demand bigger pipes - more bandwidth. But that's only half the problem. The bigger problem is what I call the teenage daughter syndrome. Mom and Dad buy a nice house in the 'burbs with only one bathroom. Mom and Dad start talking to the Realtor.