Cars are the biggest piece of tech most of us own, but they're relatively conservative. Newer models may come with USB ports, Bluetooth, and touchscreens, but those have been elements for years. And the touchscreen experience isn't generally all that good, even with spiffy spoftware.

But significant enhancements are gradually working their way into our vehicles. A number of vehicles can detect when other cars are in their blind spots. Some can parallel park on their own. There are models in development that can drive limited distances without input from the driver. And, of course, there's Google's self-driving cars.

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