Seeing your innovation come to life

At PennLive.com, John Caddell recently wrote about his experience of using one of the innovations he had a major hand in creating.

He made this statement about the in-air wifi he recently had a hand in creating:

And one illustration of it is the delight you get when you realize the product is being used by real people. In fact, this feeling may be the biggest rush in innovation.

Do you agree with this statement? Has there ever been a time when you've seen your innovation used by the public?