Here's a challenge. Get Google Play Music to play on a Sony Bravia smart TV.
The desktop web interface is so heavyweight that the built in Opera browser can't hack it. It almost gets there but is clearly memory overloaded.
I've tried looking for a uPNP/DNLA i/f to GPM but without success. And anyway, the DLNA support in the TV is primitive.
Chromecast?
I've also successfully cast the whole desktop and so passed winamp audio (win7) to the TV.
This has made it more important than ever to be able to upload playlists and sync them from winamp to GPM.