Head-up displays have evolved beyond the bulky in-console navigation units from only a few years ago. Today, tier suppliers and aftermarket manufacturers have introduced head-up display systems for the auto market that project speed, compass direction, warning messages, radio information — and soon even Yelp reviews — right on the windshield itself.MICHAEL WHEELER, MANAGING EDITOR, [email protected] Only a few short years ago, the use of displays in automobiles was considered a luxury spec reserved for high-end vehicles. Today, however, rapid developments in automotive infotainment and navigation systems have made displays a centerpiece in most automotive designs. Lane departure warnings appear when the driver goes off course. Photo courtesy of Continental AG. 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