Not sure if there's a thread on this yet (didn't see one), but my Uber driver this morning was a Tesla employee and he told me he believes the 901 Pace facility (where the reveal party was) is going to be dedicated to seat manufacturing in-house for S, X and beyond. Has that been confirmed or announced anywhere? If so, I'd definitely expect faster improvements or more options in seat designs coming soon (but not immediately since it takes time to ramp up a production facility). This is consistent with Musk's philosophy (if a supplier screws you, bring it in house).
-CB
-CB