Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
HDMI is only because the media providers want to force HDCP, which is their great anti piracy idea. If they can get all consumer electronics to use HDCP, then they think they can stop piracy, eliminate copyright expiration, and eliminate the concept that "you bought it and can use it any way you want".
HDMI = bogus DRM, and it should not be this way !