The huge difference being Sky weren't just buying another broadcasters 3D content to add they shot live footage and broadcast a channel pretty expensive if viewing figures are low.
As for a commitment from Sky I've only seen the following
Quote:
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A spokesman for Sky said: "Sky 3D viewers tell us they love the channel. We’re being more selective with what we chose to broadcast on Sky 3D, with a focus on movies and entertainment such as the Oscar-winning Gravity 3D and David Attenborough’s latest 3D documentary series coming up at Christmas."
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http://www.telegraph.co.uk/culture/t...-schedule.html