PVR HDTV?

From Sean Alexander’s Addicted to Digital Media blog, I learned that the Dish Network is planning on bringing a HDTV-PVR system to market in a few weeks. I was just begining to wonder about HDTV + PVR functionallity. I’m really interested in how Media Center systems will incorporate this functionallity. I really dig the new Gateway Media Center with it’s stereo-component form factor. According to the specs, it has Composite A/V inputs to the TV Tuner card. Does that mean it can PVR HDTV too?