The PlayStation 3. Sony claimed it would last a decade. With all the problems they have had getting it out the door, you'd think they'd want to make all the trouble they've had to go through worth while by sticking to that claim. Yet, it seems they are already talking about the PlayStation 4, which could arrive in as few as 4 years. At the same time, many are also saying that this could be the end of the PlayStation line. Would either surprise me? Not really. While demand for the PS3 remains extremely high, supply remains extremely low – much to the chagrin of millions of potential customers. If you make someone wait too long, they'll just go on to something else. With timelines for proper supply extending in to 2008, you'd think that another console would be much further out that just a few short years. According to a Sony VP, however, that's not the case:

“To say that there will be no PlayStation 4 because of a management change is a bit far fetched,” said vice president of technology for Sony Computer Entertainment Europe, Paul Holman, in an interview with Smarthouse web-site. He also indicated that the PlayStation 4 would be launched by Sony, but not until at least 2010.
So soon? They must have some serious aces up their sleeves or expect 2007 to go much smoother.