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Now Playing: 4-8-13 Marketplace Tech: The Future of Mobile Television

Television stations have powerful transmitters. Instead of the sometimes slow and often expensive Internet, why not use those transmitters to get TV shows into smartphones, tablets and other mobile devices. The National Association of Broadcasters big show is going on right now in Las Vegas and one key development is called, simply 'Mobile TV' -- special smartphones or special add-ons for mobile devices so you can keep watching when you head out the door.