Yeah, but most of that is not technical. How long has Beats streaming service been available?
I don't think Apple bought Beats for its technology. It bought Beats to gain access to:
1) licensing deals for on-demand streaming (which would've otherwise taken years to negotiate)
2) Two executives with strong industry contacts
3) An already assembled staff of music experts and a great algorithm for matching users with music they'll enjoy
It saves them years or negotiations and development and allows them to put something on the market sooner rather than later. It's worth $3.2 billion for those reasons alone.