Most people want USB input sorted out before niche output products like that. There are plenty of wireless headphone which work off analog. The latest improvment is a codec from a company called Kleer. A standard blutooth headset is limited by the blutooth audio codec which is anything but hi-fi. A headset using the kleer codec connected to analog will sound better than a direct USB connection using the blutooth codec. http://kleerwirelessaudio.blogspot.com/
If you have a wi-fi network I wouldn't like the idea of sharing bandwidth with a point to point 2.4 ghz device.