Google also released the Pixel C tablet in late 2015, which was a massive improvement over the Nexus 9.
The Pixel C was so much better: Beautiful screen, built like a tank, everything felt solid and relatively light weight, Android performed excellent on it and with Nougat it was even usable as a true productivity device because of multi tasking. I loved the Pixel C. When I tried to upgrade it to an iPad Pro due to it having reached its EOL, I returned the iPad Pro after a couple of days and kept using the Pixel X, until Google announced the Pixelbook. Then I managed to sell the Pixel C for about 300€ because it still looked prestine and the person who bought it brought it another 2 years of use thanks to some after market Android image.