810 mass production is apparently next year. The 801 and 805 will be milked until the diminished return curve intercedes. The 810 will be planned based on that forecasted point.
To quote Mr Krabs from Spongebob: Money money money.
I think that you didn't follow my post.
The 805 sampled beginning last November.
When it moves to production, the internal labs are released to sample the next great thing.
It's often a 4-7 month schedule.
The people and facilities to do it at the fabs come at a high-demand premium.
Improvements are staged. They need to learn first how to integrate and build Adreno 400 series GPUs (805) before changing out the CPUs with it (808/810).
And it is about the money.
How to not waste it, how to get return on investment to pay for the next project.