How many "radio stations" do you think can be provided by the 700-MHz spectrum that's being freed up as TV channels switch from fat analog signals to thinner digital transmissions?
We're going to find out, because the FCC has just approved the conditional unlicensed use of white-space television spectrum.
As Larry Page, co-founder of Google, wrote, "These spectrum signals have much longer range than today's Wi-Fi technology and broadband access can be spread using fewer base stations resulting in better coverage at lower cost."
What you're witnessing is the rapid acceleration infrastructure designed to enable any and all Internet-powered devices – and anything that can be provided on them, such as radio.
Whether or not that radio comes from the federally sanctioned licensees who now own the broadcast towers.