Based on latest information, popular leakster Evan Blass has recently tweeted a post which suggests that the release of the Android O has been scheduled on the 21st itself.
Besides, this week of the 21st is likely to witness some other exciting releases as well. There is information that the Google Pixel devices will receive this Android O update with its release itself.
However, there isn’t any confirmation received from Google yet. Android O is available in the beta version and it is being expected to be compatible with the Pixel or Nexus devices primarily.