This Sun-Times article discusses what technologies to expect to hit it big in 2004.
The author speculates that Wide screen/HD TV, Portable Media centers, Home Media Centers, and PVRs will capture the limelight this year.
In discussing the prospect of Portable Media Centers ("iPod on Steroids"), the article states that another Microsoft-Apple battle may be coming, claiming that "Apple is testing a device in Silicon Valley".
Steve Jobs had discussed reasons why he doubted portable video players would approach the success of portable audio players. Of course, Jobs teases "Now, I'm not saying we're not working on something like that, Who knows what we've got in our labs?".