Garmin, TomTom see no detours for GPS navigation
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 18 years
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http://www.usatoday.com/tech/products/2010-06-09-summertechg...
Garmin's new Nuvi 3790T GPS device is thinner than an iPhone, has a beautiful 5-inch LCD screen, can run traffic directions in 3-D, and easily slips into your pocket, making it perfect for use in the car or while walking.
It's arguably the coolest-looking GPS navigation device to date. But analysts who cover the two biggest navigation device companies, Garmin and TomTom, aren't sure that's enough. Within a few years, they contend, the GPS device will be overtaken by GPS apps in smartphones. Several models of phones with Google's Android operating system now have free turn-by-turn directions. And many apps are available for the iPhone to add turn-by-turn directions at a cost that rivals the purchase of a stand-alone device.
In my opinion
I feel it's better to have both gps and cell phones to be used seperately for battery and safety reasons. That way a phone can be tucked away in our pockets being used in case of emergency.
Mike