By Margaret Lyons
Updated December 22, 2010 at 05:09 PM EST

Sony launched Music Unlimited today, a streaming service the company is positioning as a competitor to iTunes. The subscription-based program allows members to stream from a 6 million-song catalog to Sony devices, including PS3, Vaio computers, and web-enabled TV and Blu-ray players — but not mobile devices yet. Music Unlimited debuted in the United Kingdom and Ireland today, and it set to roll out in other countries, including the United States, in the coming months.

On the one hand, yay for the cloud. More cloud-based options are a good thing, and that’s one of the lingering issues with iTunes. On other hand, though, the big innovation — one that no one has been able to tap yet — would be mobile streaming from the cloud.

As far as streaming music through my PS3 goes, I guess that’d be cool? But I can’t see myself paying for it, especially on a monthly subscription basis.

But maybe you would, PopWatchers. Do you think Music Unlimited could topple iTunes? [Variety, WSJ, CNET]