Originally Posted by CaptNKILL
I don't know if anyone mentioned this yet, but I read that HDMI can only carry video up to 60Hz. So even with a 120Hz screen you can't hook it up to a PC to get more than 60fps with vsync.
It isn't like setting your refresh rate to 120Hz on a CRT and having a 120fps frame rate cap with vsync+triple buffering. You'd still be stuck at 60fps but the TV could sort of blend it out to 120Hz (which probably creates lag and ghosting).
The purpose of 120Hz that matters
is judder free playback of both 24 and 30 fps sources. Nothing more nothing less.