Nvidia is likely wrapping up support for its Shield and Shield K1 tablets, as it has come to light that the company won't be pushing out the Android Oreo update to these devices. The information came courtesy of someone who's part of the software QA team at the company. We will be providing an update soon for the SHIELD Tablet K1 based on Android N. Android O is not coming to the ST/ST K1. Manuel Guzman (@ManuelGuzman) October 12, 2017 So you can see they revealed the company is working on a new Android Nougat-based update for the K1, but users should not expect the Oreo update...
Source: https://www.gsmarena.com/nvidia_shield_shield_k1_wont_get_oreo_update-news-27723.php