The reality is that MOST people surf the net for fun, entertainment, and information. While businesses may see it as a marketing or sales opportunity, users do not see it primarily as a buying opportunity.
Most TV programs have a very brief lifespan.
That is due to the simple fact that most people won't watch them. A web site is successful only if a lot of people visit it, like what they find, tell others about it and keep coming back. Narrowing that search to only those sites which include the phrase 'for sale' still resulted in over 7,000 sites. If you offer pertinent and timely information to viewers they WILL use your site If you plan to sell computers via the Internet you have some very serious competition. On the other hand a site that provides significant information on computer configuration or setup, or tips on using common software, or component specs, etc. can be a valuable resource for people.