If your first reaction was "C'mon! How can a sweater be 'digital?'" let me be among the first to tell you that it's possible.
Macy's is selling a Sean John Combs (aka P. Diddy, Puff Daddy and whatever) jumper for $98. For an extra $223, you can purchase a digital add-on.
The sleeve features a 2.8 inch HD screen with 10 hours of battery life and 2GB on onboard memory. The idea is that you load up whatever video you want to the device so it plays while you walk around.
Apparently, "wearable electronics" are the next big thing.