[sp332]

I'm not sure what you mean. The inputs (eg. HDMI) don't support the bandwidth necessary for 120 Hz, but if they did, the LCD could display them. Interpolating frames is similar to upscaling DVDs to an HDTV. You make a better picture out of the inputs available.

[kierank]

Since framerate choice is not usually a technical but an editorial decision in order to create a particular effect, then saying interpolated frames create a "better picture" is hugely debatable.