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IFA 2012: Big reveals for Sony, Samsung

Time to learn German for Wednesday's tech news roundup:

Tons of devices being unveiled at the IFA trade show in Berlin. The highlights from Wednesday include:

• Sony releases its first 4K TV, the 84-inch XBR-84X900. No official word on cost or availability, but expect to pay close to $30,000 to own one. Here's an explainer on what a 4K TV is, but no need to worry about new formats just yet. Afterall, what movies do you own in 4K? • Sony showed the Xperia S tablet, available Sept. 7 starting at $400. It has several TV-ready features, Android
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