you can try, and try, and try but you can't teach someone that doesn't want to learn.
I had a situation the other day where I was approached by a young couple. She was open and wanted to try Glass. He was an Apple fan and didn't want to look in our direction. I demoed Glass for her at the beginning of our event. She spoke with him during breaks and by the end of the meeting he was willing to try Glass.
All we can do is demo Glass to the people that are interested. Eventually we'll demo Glass to someone JR Smith trusts and that person will be able to change his mind.