NVIDIA announced a few days ago
that an Android 8.0 Oreo update is available for Shield TV owners, which was supposed to bring Experience Upgrade 7.0 and many other improvements.
Unfortunately, it appears that the update needed a bit more work since NVIDIA announced the rollout has been halted due to some issues that have been discovered only after it started the deployment of the update.
We’ve uncovered a couple issues thanks to feedback from our preview program that we’d like to fix prior to rolling out SHIELD TV Experience Upgrade 7.0 to more users. We’re actively working to resolve the issues that have been encountered and hope to be able to restart the rollout shortly.
If you haven't received the update yet, then maybe it's for the best since we don't exactly know what issues affect Shield TV
devices after upgrading to Android 8.0 Oreo. The good news is the update is still coming as soon as NVIDIA fixes those issues, so we'll just have to wait to see how long that will take.