Thinking fingers

I noticed that I tend to use my middle finger to point and press buttons and such more than I do my index finger. However, I do use my index finger almost 100% of the time when I'm feeling and examining something.

I started thinking about how this might be some sort of evolutionary thing. In the future, human index fingers might evolve to become some sort of super sensitive digit, maybe even like a feeler or an antenna. Maybe our hands would look something like those of an aye-aye with our index fingers being almost useless except for sensing. o.O