This function is specific only to the HDMI input that is meant to be connected to a device (like a Blu-Ray DVD player) that outputs 1080p/120Hz. You won't see anything if you are watching regular broadcast. Although the 120Hz function can be turned off, I've read reviews where the reviewer said that this function give the image an almost video-like quality, meaning that it eliminates some of the blur associated with film-based product, but the blur makes a movie look like film rather than video. So, I guess it's a personal preference. If you don't have any plans to buy a Blu-Ray player or PS3 that outputs 1080p/120Hz, then don't worry about it. A good 60Hz TV will still look stunning when properly connected.
Okay, so I'm pretty much ready to go on a LCD purchase. Im looking at the Sony lines. I like the picture and have read mostly good on them. Here is my problem: Costco has the KDL46VL130 for $2,000 a 60hz set. Best Buy has the 46XBR4 for $2850 a 120hz set.
i watch TV less than 8 hours a week. A dvd once in a while, football every sunday...TV goes in a very bright room. I tend to own t.v.'s for a long time. I sit about 8-10 feet from the set.
Is it worth the extra $850 to get the 120hz set? A secondary advantage to the cheaper set is the Costco return/warrant policy.
Thanks in advance for the responses. Brian