I sure hope Dean Kamen will not be remembered as the guy who invented the Segway but as the guy who came up with AutoSyringe and his work on dialysis pumps.
Fun fact: The core of AutoSyringe and his dialysis pumps was delivering super precise dosages of medication. DEKA applied that same technology to the new Freestyle Coke machine (delivering super precise amounts of soda concentrate), in return for Coca Cola helping them distribute the Slingshot.
I've met dozens of students at MIT who say the experience with FIRST was the main reason they decided to study science and engineering. (And I've heard similar stories from folks at Stanford, CMU, etc.)
Dean's a genius with an amazing team, but that impact can only go so far. Inspiring thousands of new students in STEM careers is solving the world's problems at a meta level.
Especially since the Segway was just a spinoff of technology developed for the awesome iBot wheelchair that can balance the user at normal eye-level, negotiate curbs, and even climb stairs. https://en.wikipedia.org/wiki/Ibot