Bluetooth speakers dont exist as far as i know.
I do know that you can have wireless speakers, but they are fairly clumsy or use pretty expensive devices on the sending and the receiving end, and of course, the quality suffers. For instance if you ripped a cd to your hd thats analog > digital > BT > digital > analog. That is unless there is a BT > analog converter.
I do know that BT can be used for data transfer, and one music company does use this, but it is only for MIDI data, not sound. So i guess not, although with BT headsets for cell phones etc. it should be possible, but maybe just not high enough quality for production. A wired signal is and will be the best quality for many years to come.
If someone does stumble across them let us know.