I myself do not have high requirements for Audio/Video quality. For example I am happy with 1080p Video and my TV and monitor are 1080p only. All my speakers are either cheap 2.1 Creative speaker or sub S$100 Bluetooth speakers from Creative again.
Still I can see people go for higher end features like 4k, HDR, Dolby Vision on the video side and then Dolby Audio, DTS, Dolby Atmos, on the audio side.
Content providers like US based Netflix, Apple, Amazon Prime Video, Vudu, China based Tencent Video, iQiyi Video, Youku Video, Japan based Rakuten, etc, start to offer content in Dolby Vision and/or Dolby Atmos.
https://www.mesalliance.org/2018/07...increased-atmos-vision-momentum-in-q3-mesa-2/
Apple TV 4k seems to be one of the leading streaming device supporting both Dolby Vision and Dolby Atmos. And Apple iTune store offers the contents. Future Apple streaming service may offer such contents as well.
Microsoft XBox One also supports both Dolby Vision and Dolby Atmos.
On the Android TV boxes side, Nvidia Shield TV is the king but it will not get Dolby Vision support. And even though it supports Dolby Atmos but the Netflix app on Nvidia Shield TV does not support Dolby Atmos.
Amazon Fire TV Stick 4k is the best in this aspect among Android TV boxes, supporting 4K HDR10+, Dolby Vision and Dolby Atmos. It does not support DTS though.
https://androidpctv.com/review-amazon-fire-tv-stick-4k/
Mi Box S supports 4K HDR 10, Dolby Digital 5.1 and DTS 5.1, no Dolby Vision, no Dolby Atmos.
https://androidpctv.com/review-xiaomi-mi-box-s/