Interesting, I wonder how many potential Sony owners know the probability of receiving a bad unit.
Sony isn't unique in this respect. Most projectors don't have perfect uniformity. 75% sounds bad in isolation but you won't find significantly different results with most other projectors in that class. I think people can spend a bit too long worrying about projector specs they would have been unaware of, had they not read about it. If you can't notice a problem when you're watching, it usually doesn't matter. If it makes you feel better, you hear the same complaints with OLED tvs but my 77" LG delights me every time I use it.
The larger cinema Sonys which use a 1.48" imager ship with a camera that monitors the projector's uniformity and runs an automated procedure keeping it in check. There are additional adjustments that help maintain contrast over time.
banding and posterization
The larger cinema Sonys which use a 1.48" imager ship with a camera that monitors the projector's uniformity and runs an automated procedure keeping it in check. There are additional adjustments that help maintain contrast over time. Camera? You mean Sony can spy on what you watch?