Because all the stars in the Small Magellanic Cloud have approximately the same distance to us, the observed relationship between apparent brightness and period implies that there is an equivalent relationship between absolute brightness and oscillation period. (talkorigins.org)
At least one user claims the feature now actually controls absolute brightness instead of relative one, thus being more similar to some custom implementations from third - party smartphone makers. (androidheadlines.com)
However this isn't about absolute brightness, it's about the range, so although you'll see some LCD manufacturers talking about 1000 nit brightness, others, like OLED manufacturers, might be offering 800 nits. (pocket-lint.com)