That’s in part because for now, at least, you can’t move a white-space device around. You can’t put a white-space radio into a phone or laptop because each white-space device must check its location against a database to determine which TV channels and wireless microphones are being used in the device’s area, so they can avoid those channels.

via ‘Super Wi-Fi’: Super, But Not Wi-Fi | News & Opinion | PCMag.com.

That may change a few years down the road, when “personal/portable” white space devices appear. Based on the 802.22 standard, these will be chips able to fit into laptops and tablets, with software that can “sense” clear frequencies as they move around.