Maybe not the next thing, but an upcoming thing

Portable transistor radios were cool, the walkman was cool, CD players
were cool, mp3 players were cool

In the vein of XM radio, the new heir apparent to portable coolness is
mobile multimedia to your blackberry (yeah! I'm all about that! after
spending the last 12 hours playing with it!) pda, cell phone or some
combo thereof.

Prices will come down, usage will go up and we'll be swimming up, down
and slipping all over the stream.

Read more at:

Streaming Music Continues Reign as Mobile Multimedia Favorite
http://www.mobiletechnews.com/info/2006/08/23/131418.html