There are various ways you can enjoy The Rumble on your TV.
Roku
If you have Roku, you can stream the event to your TV through a dedicated channel.
First purchase the debate here. Then go to the Channel Store on your Roku and add the "The Rumble 2012" Channel. Log into the channel with the username and password you created on TheRumble2012.com to watch the debate on-demand.
Apple TV
If you have an Apple TV (2nd generation or later), you can stream the event to it using AirPlay. Simply bring up the event video in a web browser on an iOS device that supports AirPlay, such as the iPad 2 or later or the iPhone 4 with iOS5 or later. Then activate AirPlay on that device to stream the event to your TV through your Apple TV.
HDMI
If you have a device that supports mirroring through HDMI, you can connect that device to your TV using an HDMI cable. Notable devices that support HDMI mirroring are the latest iPad, iPhone 4 and later, Samsung Galaxy S II and S III, Samsung Galaxy Tab, HTC EVO, HTC One X and One S, and the Motorola Droid Razr Maxx. You may need an adapter to connect the HDMI cable to your device.
Most current HDTVs can also act as a computer monitor. If you have one that does, and you have a laptop that has an HDMI output, you can connect the two with an HDMI cable.
Once your device is connected to the TV, just bring up the event video via a web browser on therumble2012.com on your device.
Boxee Box
If you have a Boxee Box connected to your TV, you can access the event by going to therumble2012.com and bringing up the event video using the Boxee Box's web browser.
Google TV
If you have a Google TV connected to your TV, you can access the event by going to therumble2012.com and bringing up the event video using the Google TV's web browser.
Logitech Revue
If you have a Logitech Revue connected to your TV, you can access the event by going to therumble2012.com and bringing up the event video using the Logitech Revue's web browser.