there are no known smart tvs that will pass through HD audio via app & e-arc.
e-arc appears to be a function limited to HDMI to HDMI.
in other words, e-arc works with external hdmi sources (ie shield or bluray players or consoles, etc)
e-arc does not appear to work with via software tv apps.
whether this is an hdmi limit/restriction, or tv manufacturers simply have not updated their internal core software/hardware to be compatible with e-arc, is unknown.
the shield is still the only mainstream solution for 4k/hdr/dolbyvision/atmos.
