Dual ATSC tuners, dual cable card inputs, a 250 GB SATA drive that will give you 32 hours of high definition programming, HDMI output and that THX logo, a first for any DVR. What did THX do? They gave Tivo notes, and Tivo redesigned their circuit boards to reduce interference and noise as the good folks at THX found it. The thing next to the remote that looks like the world's smallest cell phone is really a wireless transmitter that hooks via a USB cable to the back of the Tivo unit and "joins" your wireless network allowing you to get program guides wirelessly. Really cool. $799. Can't wait!