Nvidia has started rolling out a new update to the Shield Tablet K1 that adds Vulkan support and brings Android Marshmallow version 6.0.1 to the tablet. Aside from the Android 6.0.1 goodies, the update - which bumps the software version to 1.2 - also includes Android security patch for the month of March, as well as several other features, improvements, and bug fixes. Here's the complete change-log: Supports the new Vulkan API for high-efficiency access to SHIELD's graphics hardware Adds Android 6.0.1 changes including: Repositioned Navigation Buttons in Landscape...
Source: http://www.gsmarena.com/new_nvidia_shield_tablet_k1_update_brings_android_601-news-17766.php