It's unclear if the P has much left in it for a Ludicrous mode.... (cue one of the battery wonks to come discuss C/discharge rates)
Air suspension I could maybe see, even though I'm not personally a fan of it, once they're reliably profitable and can afford the initial hit on adding MFG complexity.
Ditto the heated wheel I guess- although being able to set interior temp before your drive removes most of the need for this OR vented seats (which of the two I'd rather have- but then again I don't live in Canada)