The Nokia 8 is expected to be launched on August 16, which happens to be about a week after the supposed launch date of Android O. A Geekbench listing has shown a device that looks to be the Nokia 8 running on O.
https://www.notebookcheck.net/The-Nokia-8-may-be-the-first-device-to-ship-with-Android-O-also-expected-to-feature-a-monochrome-rear-camera-sensor.240048.0.html