Tends to depend who you speak to from experience. I've been told I will have the new battery and heated seats/steering wheel, and I have been told that I won't, on the same day, by different reps.
My experience seems to be that the ones who say that I will have those features give more specific answers and those who say I won't I generally get copy paste macros, so I'm choosing to believe the ones who said I will get it. Either way, I have screenshotted whole conversations with Tesla CS saying that I will have these features, and I will be ready to show that conversation on collection in the event I don't have those features.