Even if you haven't heard of CES, the consumer-tech industry's annual January gadgetfest in Las Vegas, you've certainly lived with some of the products that were launched there. Cases in point: the compact-disc player, which debuted in 1981, and high-definition television, which appeared in 1998. To be sure, the expo is also known for big promises that didn't exactly pan out. (See mid-'90s AT&T; videophones.) And yet it's the best place to get a first look at the new ideas in technology that may well wind up changing your life--eventually.
This year, during the keynote presentation, Audi's A7 sedan rolled onto...
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