I purchased a 75in Q90R tv. I have a 5.2.4 home theater. My Pioneer svx-lx503 AV receiver was upgraded to eARC capability for lossless Dolby Atmos sound via a firmware update from Onkyo. I purchased this tv partially because of a promised Samsung firmware update to enable eARC on this tv. This is Samsung's "flagship" tv. Sony is providing eARC on their top tvs. Why is Samsung delaying providing this update when Onkyo can do it for a mid level receiver? Come on guys, it is ridiculous that a tv this expensive doesn't have top sound. If this doesn't get done, I'll go back to Sony.