It is still a common barometer in the Consumer electorincs industry internet porn or not that is how MANY manufacturers view it...you can tell me all you want that it is no longer valid but as a consumer electronics buyer over the last 10 years for a distirbutor that does about 50M a year I think I know what I am talking about.
Below is why it is a good gauge
Some $4.28 billion worth of adult videos were sold or rented in 2005, according to Adult Video News. About 1 billion adult videos were rented in 2005. And statistics show that there is affluence among porn aficionados. Some 35% of them have incomes over $75,000. That's enough to buy a high-def DVD player or two.
http://www.cepro.com/news/editorial/16901.html