Radio in the US is dying, but anyone who thinks it's dead is in a bubble outside mainstream culture. Yes it's easier than ever before to become famous without radio, and artists with no radio play more frequently top the album sales charts, but just look at the iTunes single charts to see the continuing dominance of radio. 99% of the time the top 10 singles are all over pop/hip-hop/top 40 radio, and it's almost impossible to outsell those kinds of acts without the radio. Even the top-selling albums are still mostly driven by radio play (though increasingly less so).