You're right, open source and the Web have both done a lot to take down old-school, straight-ahead proprietary ploys such as closed source, market-power-based de-facto standards that competitors have to reverse-engineer at very high cost. Even on Windows (itself still closed source).

The two technical/cultural shifts, open source and the open web, make for a good trend.

That's why counter-trend action such as delayed-open (Dart), delayed/partly-open (Android, e.g., but other examples are easy to find) raise hackers' hackles. At least for some hackers.

And hackers aside, the competing vendors meeting in existing standards bodies get left out. That clouds the prospects for future standardization, unless (again) based on market power. Which is not there, if the topic is Google Dart (and it is :-|).