I've been using the latest aftv stick - DV and lossy atmos from streaming apps (have to sideload vudu, but works when you do. ) it's not perfect, but getting there. It has replaced the shield for most of my streaming now.
To be fair to the original question, I still use the shield as my plex player. Lossless sound, hdr (no dv), and but perfect playback of the mkv and very good ui. OPPO still produces the best image, but the ui for network playback is abysmal, and very temperamental.
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video: Lg 65e6, Oppo uhd-203, Roku ultra, nVidia Shield Pro
audio: Yamaha aventage 3050, ATI AT252NC, martin logan efx 7.1
gaming: Ps4-pro, Psvr, Ps3
other: Synology d216play, Panamax m-5300pm & m-5400pm, a billion smarthome things