Steam is kind of like the often pondered benevolent dictatorship.
Sure, he's the only guy in town, and nobody's ever going to dethrone him, but do you really care when he showers the city in cupcakes twice a day and kisses all his citizens goodnight each evening?
Valve's definitely earned the deathgrip they have on the market, and I'd never wish for anyone to take it from them.
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Falcon Punch
http://www.youtube.com/watch?v=FFtw7qW7Vcw