It seems that Sonys broadcast machines for HDCAM do not playback 720p format HD (unless you get to the HDCAM SR range). The offered resolutions are 1080/50i, 1080/59.94i, 1080/25p, 1080/29.97p for record and all those plus 1080/23.98p and 1080/24p for playback. Do you think this spells the downfall of 720p as a format of the future? I'm guessing a lot of mastering houses may decide against the SR route (as the machines retail at nearly twice the price) and as such future formats such as HD-DVD & Blu-Ray may be restricted to up/cross converted 1080i or 1080p. What are your opinions?