Really disappointed that it does not support the current line of Google phones - in particular the Nexus 6P. At least it is not listed as officially supported on the website - which only lists the Pixel:
> Caution: The 6P's thermal performance is not representative of the consumer Daydream-ready devices that will be launching later this year. In particular, expect the 6P to thermally throttle CPU and GPU performance after a short period of use, depending on workload.
It seems that it's a hardware issue.
[1] Obviously the VR SDK is not the benchmark here, the other well publicized overheating problems with consumer apps are