I read this here and was expecting to get the same email, but nothing. Mid November I reached out to my DS asking about upgrade pricing. He told me they'd get back to me closer to delivery date. I never heard back and didn't inquire further. Another buyer did push for more details and was told there would be no additional fee and he should consider himself lucky.
I ordered a Model X on 2016-09-19, and included the "Autopilot Tech Package" for €3300.
It will be delivered in the next few weeks in Belgium. I just contacted my delivery specialist about the the autopilot situation.
He confirmed I will be getting the functionality that I ordered, no extra cost mentioned or anything.
The order agreement does mention "Autopilot comfortfuncties" (Dutch, literally translated to "Autopilot Comfort Functions") and the delivery agent explicitly writes "Autopilot Convenience Features" is in their system.
There was no mention of paying extra to upgrade to EAP or anything similar. Also, the order agreement is very specific about the fixed price and features, they can't contractually deviate from that.
I hope we're just getting EAP at a discount, grandfathered in as it were. It's the only sensible thing Tesla can do. Keeping multiple configurations has an engineering cost and taking away features is contractually not allowed.
I have also ready in this thread and other sources that buyers in the US can pay for an "upgrade", but I think with the stronger consumer protection laws in Europe they are not doing that here.
I'll hope I'll be in the same situation as Hans.