A very thought provoking article. I got through the first few paragraphs and was already thinking about what was or could be unique about my playing. The first thing that came to mind was the emotion that a unique person brings to the music. Carlos Santana comes immediately to mind as having an unmatched emotional quality.
I don't sound like Santana, but that's the point. I have a sound that could stand out if I develop it well. I think that there are a lot of new sounds still out there and guitar players that could contribute new and unique styles to music and I thank you for encouraging us to try.