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US Court Rules Google a Monopoly in 'Biggest Antitrust Case of the 21st Century'.
(www.commondreams.org)
This is a most excellent place for technology news and articles.
They're not anti-competitive, that's the difference. Devs can even sell Steam keys on their own website and take 100% of the profit if they so choose, and there's absolutely no lock-in.
I'm not sure where the anti-trust is. Having a high marketshare by itself doesn't mean you're committing anti-trust, abusing that market position does.