Sony continues to be a proponent of the AOSP idea, but the company seems to be taking a cautious approach when it comes to expectations. "Obviously a lot of more work is needed but we think it’s great to see the progress in this project," a post on Sony's developer blog reads, caveating, "even if we can’t be sure if this software will ever be stable and complete enough for daily use." Sony does say the provided binaries will allow the device to turn on and reach Android's home screen. From there it's all up to the development community, though these days that should give you more hope than any cause for concern.

Thanks, Floris W!