NVIDIA has issued its TV devices with a new update. This version of SHIELD Experience (8.1.1) includes a host of new features and bug-fixes. The most prominent of these may be the limited-time opportunity to upgrade the free GeForce Now subscription to a Founder's membership instead. The upgrade also adds XBOX Elite 2 controller support, as well as improved multiple Bluetooth device connections.
https://www.notebookcheck.net/NVIDIA-releases-a-SHIELD-TV-software-update.454790.0.html