"When you say self-driving cars and Glasses had been done before many years ago, you must mean experimental prototypes that never made it to market, right?" Fo

"When you say self-driving cars and Glasses had been done before many years ago, you must mean experimental prototypes that never made it to market, right?" Ford, GM, BMW and Toyota are among manufacturers working on what Google is getting virtually all the press for. We'll compare them when you can buy a Google Self-Driving Car at your local dealer. How can you judge Glasses and compare them to others? How many have you used and tested?