For me, inventing video games was just one successful thing I had done among many others.
All my friends, they're all gone. I've outlived them all.
By and large, I'm in the same boat as other inventors. If we're lucky, of the 10 or 15 items we do a year, maybe one or two of them wind up with a licensing agreement.
When technology is ready for something novel, when the components needed to build something new become affordable, it is going to be done by someone and more likely by several people.
If I learned anything from the Army, it was about being able to get things done, no matter how tough the assignment, and it served me later in life.