Many sound bars don't have any sort of audio out so it would be very useful if the TV could provide an audio out so it can be connected to a Hearing aid adapter. At the moment the optical, analogue outputs are disabled when HDMI ARC is being used.
I have a partner who is hard of hearing and needs to use the direct TV connection to understand the program dialogue clearly. For me i can just use the normal sound bar output.
So when HDMI ARC output is being used also have option of optical/audio out and bluetooth.
I have seen quite a few requests for this type of feature in the various forums or problems connecting hearing aid adapters with sound bars on LG webos TV.