That kind of "pull the ladder up behind you" strategy would be a natural thing for today dominants players to try. They benefited from an open playing field, bu

That kind of "pull the ladder up behind you" strategy would be a natural thing for today dominants players to try. They benefited from an open playing field, but now they no longer need it. If they succeed, they have established a massive moat to stave off competition. If they manage to get it into standards and legislation, then undoing it would require a tectonic shift. Google is especially well positioned for this - Chrome, Google Search, Android and Youtube being potentially very effective places to do DRM media gatekeeping. "don't be evil" had to go from their mission statement. Maybe "universally accessible" will be next...