I'm always interested in how people understand that human innovation increases at an exponential rate. Even so, the estimated rate always seems to be lower than what really happens. I'm sure there's a mathematical function to model this fact, but it probably wouldn't help anyone's understanding.
I think a more simple answer is belief. In the late 1800's people shunned innovations, thinking they would not work. In the end, 'horseless carriges', tractors, and eventually radios proved haters wrong. Now even minimum wage workers use fairly current technology either in their job, or in their home. People have been overoptimistic about new technology probably since the 1950's.
How long until this population gets apathetic about new gizmos?