To steer this back to on-topic:
I think the interior, as well as some of the exterior, finalized designs are being held close to the chest on purpose as Tesla likes to do. Not too long ago, when Motor Trend went to do the photo shoot at the Gigafactory, they were strictly instructed not to document interior, and Elon made it clear that the interior was not finalized for the prototypes at the reveal.
Here's why: At this point, nearly every company SHOULD BE working on a competitor for the Model ≡. The Leaf, the Bolt, the i3, just the beginning. Now that other car companies have seen the literal demand for the ≡, they're hot to get one of their own going. Tesla blows minds, that's what they do (personal opinion) so why would they show everything they're doing and making now just so other manufacturers can implement their own "version" of Tesla's tech or design? They're protecting themselves, bottom line.
So in a nutshell, look at the S interior, look at the X interior. I have full faith in the ≡'s interior, features, and functions. When the car is released finally, the other companies can just say "that was a great idea" instead of "that's just like OURS".