I have looked to the same burn-in tests actually, and they were just starting doing it. Some of the screens got burn-in pretty quickly.

Yes, screens have improved vastly since the first days, but my life expectancy of these devices is much longer than a ordinary consumer. I don't change a TV every 5 years.

Yes, my duty cycle is much lower than the ones gone through testing, but having one less failure point for my screens is always better. Also, I'm not a nitpicky person about contrast numbers and whatnot. If I enjoy the thing I'm occasionally watching, I'm more than fine.