I'm assuming you're talking about the ATI Radeon cards. The 64mb DDR Radeon and the 32mb DDR All in Wonder Radeon. Both cards have Video in and Video out. The AIW also has a built in Stereo TV Tuner to watch tv on your pc.
The AIW card has a DVI connector(for digital LCD displays) instead of the standard hd15 pin connector, but it does come with an adapter to use a regular hd15 pin monitor. The AIW has TV-on-demand to take total control of your TV experience: pause live TV, create your own instant replays, or record TV broadcasts for later viewing. [note: that last line was pretty much taken directly from my AIW Radeon box

]. It has also has an interactive Program Guide(Guide Plus+).
edit: The DVI connector is available only on the AGP version of the AIW not the PCI version according to the box.