Hmm. I could show where your dashed-off summary is wrong by knocking down the other three, or educating you on Ted's context. I'll go with education, as Ted would prefer.

You are confusing "I heard their names" with "They made the thing I use". Berners-Lee didn't write the browser you use. Kay isn't hard at work on the new iPhone. and Engelbart doesn't pop into the Logitech offices to see how the new controls are going.

Nelson wrote multiple critical works of theory and practice, edited very influential magazines, coded prototypes and processes that were then re-used or modified as time went on, and has continually spoken on his principles and ideas behind the interface of humans and machines. He has stressed, for over half a century, the importance of the treatment and access of information, which turns out to be the top priority of the human race in the contemporary sphere.

Ted's name has been brought up in meetings you're not invited to and events you can't attend, as well as ones you could be. His influence is gigantic, and the fact he freely shares his ideas past the age of 80 is a gift some of us appreciate very much.

He doesn't strut across a stage next to a product he yelled at others to make. That doesn't make him less of a giant.