Which browsers already support Media Queries Level 4?

Question

Which browsers already support some of these attributes? http://dev.w3.org/csswg/mediaqueries4/

This one f.e. does not work on iOS7, iPhone 4S

@media (luminosity: normal) {
    body {
        background: #f5f5f5;
        color: #262626;
    }
}

@media (luminosity: dim) {
    body {
        background: #e9e4e3;
    }
}

@media (luminosity: washed) {
    body {
        background: #ffffff;
    }
}

Answer 1

Here, on CanIUse, you can find updated and current support for many CSS properties. In this specific case, some of Level 4 Media are already supported even if in not standard way, such as:

1. "API for finding out whether or not a media query applies to the document"
2. "Method of accessing external device data (such as a webcam video stream)"