Google TV launches in the US this month.
The Google TV enabled Logitech Revue box and the Sony Google TVs are shipping in the US this month. Europe has to wait apparentely until 2011 to get Google TV. The Daily Mail mentions in a report that Google TV arrives in the UK next year. This gives the Apple TV box a head start in Europe this fall. The new Apple TV is shipping also in Europe since last week.
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Since the Google TV box only works with HDMI input there should not be a problem with the different European TV standards. I have not found an official statement from Google about the Google TV plans for Europe.