It's common for Android TV consoles to receive just a few OTA updates before being forgotten. The Shield TV, however, is now up to its 20th update with no signs of slowing down. Nvidia has added 120 Hz output, voice chat, and more UI tweaks to its aging Android TV product to make it an even better streaming box.
https://www.notebookcheck.net/NVIDIA-Shield-TV-update-brings-120-Hz-voice-chat-and-more.329552.0.html