Tom Hanks is a talented actor that went on to produce/direct - I think a very fair comparison would be someone like Paul Buchheit. I'm not going to go around asking, but I think it's safe to assume my sample would have no idea who he is.

That being said, the point I was trying to make is that you can become very successful in SV and have nobody outside of the tech community know your name - your product is your product. In Hollywood, your product is you, success is, by definition, corellated with fame.