The NVIDIA SHIELD TV box may be among the best-known of all Android TV boxes. Now, there is evidence that it is finally seeing a refresh. However, it seems that the only difference between it and the existing model is a slightly updated SoC and the ability to run Android 9.0 out of the box.
https://www.notebookcheck.net/NVIDIA-SHIELD-TV-may-be-back-with-a-slightly-new-version.424141.0.html