In Korea, you can check out the gas price on the web in advance before you fill up your car. The government-operated site, Opinet, offers a near real-time price comparison service for the nation's gas stations.
 
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For those who are always on the move, this feature will soon become available on mobile and in-car navigation. So the age-old "future scenario", where we drive our cars around and find shopping and price information around us in real time, doesn't seem too distant to finally become reality.
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