I think whatever you have said is true. I would also say we don't have to worry about eARC upgrade much (in my opinion), as i currently use my xbox one x as the 4k uhd streaming device connected directly to my Q90R soundbar and the HDMI ARC is going from Soundbar to my Samsung TV. So i'm really not going to loss any audio here (correct me if i'm wrong), I get to hear high quality ATMOS or DTS:X audio streamed from xbox and the 4K HDR video on my TV screen. Only simplification is, if the Soundbar comes with eARC firmware upgrade, i'll just connect the xbox source directly to my TV and stream both audio & video via eARC. In both cases, i'm not going to miss anything.
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