> I wonder if the 'net and mobile craze is creating a situation where CS grads are coming out of school having nearly no idea that there are very interesting worlds out there that lie outside of those domains?

I don't think so. I think its just making the world more accessible to people who normally wouldn't have entered.

I myself was always interested in CS / Programming, but never had the discipline to learn it. Web stuff got me involved later in life, and now having the discipline, I"m slowly working my way down (as it were..). I think those niche's become apparent to people who, being interested in the subjects, just keep digging.