[peterkelly]

> I don't understand who gets to use these things

You, several years from now.

The inclusion of features in the standard is an important part of the evolution of the language. But it's just one part. More recent browsers have already implemented many of these features, and there will come a day when they're pretty much everywhere. Just be patient.

(source: I'm old and remember the era when our sites had to work with Netscape 4 due to its market share)