I have a background in business magazine (print) publishing, as well as databases and direct marketing, and am currently enthusing all over our new baby http://www.modernselling.com as an online business publication.
I think the mistake here might be to assume that everything that is today's web traffic was, is and always will be the web traffic. Patently not so, otherwise we'd all be university geeks or porn aficionados. Even if "most" people have now had some web browsing experience, that is not the same as them all knowing that new, relevant, different, innovative or even me too sites exist. To the point where, even if they are online in a different guise, they might not be inclined to search there for items they did not imagine existed.
So surely we are all involved, with our SEO, magazine and other media advertising, business cards, direct mail, email broadcasts and so on, in trying to expand knowledge of the range of products and services one can usefully acquire online, and the number of people who make a habit of so doing?