At first I thought "Beats" referred to Beats by Dre[1] and wondered how an online search could support a particular brand of headphones.
They also have tons of money for advertising so they had a superbowl ad and many TV ads so I think maybe a large amount of people that don't know what spotify or rdio is have heard the name beats before.
Radio features are sweet and I may explore it more but... With the thousands of hours of listening pleasure I've gotten out of my years of Pandora subscription, why the hell would I want to switch? Building new stations is an investment of time and effort in teaching it what style of music I want, being able to import this would be sweet. I might even build playlists out of the songs I like.
To be frank without Pandora integration this just strikes me yet-another-playlist-streaming service, among the dozen others that I don't use.