clipped from CES content
One of the key things that Vizio is introducing with this year’s HDTV lineup, specifically in their P-Series and Reference Series displays, is what they call High Velocity mode. This mode allows their HDTVs to accept native 120hz input from a capable source via HDMI. This is a huge leap for PC gamers that have been stuck gaming on 120hz monitors over the years, as it was the only way to display true 120hz. With Vizio introducing this new feature, it finally allows gamers to really experience what 120hz has to offer, by displaying 120 frames per second natively. While 120hz HDTVs have been on the market for years, they weren’t able to accept a true 120hz signal, and instead used the 120hz panel for motion interpolation — commonly used for creating fake frames out of existing 24/30/60hz content.
http://www.displaylag.com/ces-2014-vizio-debuts-4k-120-inch-120-fps-local-dimming-hdtvs/