The Android O Beta isn’t going to kill your Daydream sessions.
Good news, developers and bleeding edge enthusiasts! If you’re planning to enroll your Google Pixel to the Beta Program for Android O, the Daydream app and its connected experiences are still available to you. There have been similar previews in the past that disabled access to VR services out of concern for performance issues, but clearly Google feels confident Daydream performance hasn’t been negatively impacted which is great.
That having been said, be careful. Betas are often very unfinished, and there are a lot of things that could negatively impact Daydream as you explore this new version of Android.