Obviously, our children, who have been playing with their computers since the age of five or six, don't have quite the same brain as those who were brought up on wooden or metal toys, whose brains are certainly atrophied by comparison.

When I was in Japan on tour in 2010, I felt like I was 30 years into the future. I love technology and they are so advanced with their phones, computers, everything. I think they had the iPhone way before we did in the U.S. I love gadgets, games, social media and I try to stay ahead on all that stuff, but they get it all first.

Smartphones can relay patients' data to hospital computers in a continuous stream. Doctors can alter treatment regimens remotely, instead of making patients come in for a visit.

A smartphone links patients' bodies and doctors' computers, which in turn are connected to the Internet, which in turn is connected to any smartphone anywhere. The new devices could put the management of an individual's internal organs in the hands of every hacker, online scammer, and digital vandal on Earth.

Computers rather frighten me, because I never did learn to type, so the whole thing seems extraordinarily complicated to me.