With the launch of Windows 7 this week, PC makers are trying some new things, including laptops with touch screens. The Associated Press reports that Acer Inc. is going even further, introducing a laptop with a 3-D screen. The Acer Aspire 5738DG-6165 has a 15.6-inch screen that, with the help of special glasses, appears to take on depth if used with the right games or movies. It’s not the first laptop with a 3-D screen. Sharp Corp. introduced one in 2003. Sharp’s version worked without glasses, but the viewer had to be somewhat careful to keep his head in the right place for the 3-D effect to work. Sharp’s model cost $3,300 and was aimed at engineers and other professionals who might be helped by being able to show objects in 3-D. Acer’s laptop costs just $780, barely more than a comparable, normal laptop. Windows 7 doesn’t have special features for 3-D screens, so Acer will ship the computer with special movie player software. Finding movies to play on it won’t be easy, but for computer games, it’s another matter. Most games will display in 3-D, even though they’re designed for regular screens…

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