I understand that video TV refreshes at a rate of 60Hz, it's been that way since late Roman times. Is this correct? The interlaced 480i TV refreshes at 60Hz. Now my question is what about new HDTVs that are progressive scan and alternate display technologies to the CRT? For instance does a 720P LCD TV refresh at a rate of 60Hz? What about Plasma? I believe it does but want to know if any of the video gurus out there can verify this is a correct assumption.