Except, you know, on the official Google page, and in the videos that I've seen, the screen also just times out to a low power, black and white screen (referring to the Gear Live). Super AMOLED is more power efficient in idle / dark screens due to the nature of individual pixel lightning, so I don't really understand what you mean by the Gear Live would burn out in a matter of hours (they should be relatively the same from what I can tell).
Always on = standby (i.e low brightness, dark screen). It does not mean full brightness, always coloured watch face. No way in hell. If that was the case, why would the displays time out in what appears to be 5-10 seconds?
Yeah.. I'm going to wait on conclusive battery testing before making my purchase. I've got like a week anyways, might as well.
Also, I'm legitimately concerned about screen burn in now, given the nature of AMOLED.
i've been concerned about screen burn in from time to time as well (most recently with the gnex). but then i realized it is highly unlikely i'll have the device for long enough to achieve burn in and/or notice