There were rumors on the Rolly crawling the internet for a while now, and today Sony finally unveils the truth about this new robotic toy, the ROLLY.
Essentially, the ROLLY is a kind of wireless speaker/audio player with 1GB of internal memory; you can interact with it, and select the tracks you want to listen to. The Rolly is an autonomous audio player, and has a battery life of 5h when it plays music from its internal memory, and 4h 30m if the music it streamed to the ROLLY via Bluetooth computer connection. Finally, you can also PLAY with the Rolly since it will be able to somehow “dance” in rhythm with the music it plays for you.
Well thats the basic info, we will be able to give more info as soon (in about an hour) when the press conference of the Sony ROLLY has ended. Check out all the pictures of this robotic music player.

Source : http://www.akihabaranews.com/en/news-14751-From+Fiction+to+Reality%2C+behold+the+Sony+ROLLY.html