Cleveland - Internet radio won't kill traditional terrestrial radio until you can stream it in your car without incurring heavy data usage through 3 and 4g. If your work commute takes an hour, round trip, and you stream internet radio from the smart phone while it's plugged into the car stereo you'll easily max out your monthly data usage. At that point your provider either starts charging you more or turns your streaming pipe down to a trickle.
There's two ways we'll get wi-fi everywhere. Either through some massive network available to all, which seems unlikely in the US where AT&T and Verizon will fight tooth and nail to prevent it. The other way is for each person to acquire some sort of personal hot spot or tethered device.
Yesterday's New York Times delves into the possibilities, pointing out that it's getting easier and cheaper to do it, Keeping Wi-Fi Always Within Range.
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