I think you have something there. Work has become so all consuming and with electronic gadgets there is no escape from it. Prior to the 80s, most people left their job at the office--no longer. Its either succeed or raise children. Children are viewed as a barrier to "success", so its no surprise that there are fewer of 'em.
I have dodged a Blackberry for about the same reason. Wife and I are past kid-raising but I want to be able to turn off my work for a day a week...
No kidding. Cell phones, computers, and blackberries are the cotton gins of our times. The things that were supposed to lessen our labors and make them easier have only enabled the masters to buy more property for the serfs to work faster.