Well, you have seen those "glare screens" meant to reduce glare from outside light, right?

I had the original glare screen, though mine is different. Mine reacts to when I glare at it in anger....

On a serious note, I had a prof when I went back to college in 1992 for the computer degree who had written a voice recognition script with hardware for a quadriplegic student. It was absolutely amazing. Now at that point it only worked with Office Suite products, but he could say "Open Excel" and Excel would run. Then "Open inventory" and it found inventory.xls and opened it. It was awesome to see. No idea what happened to it after that.