Let's remember the "TMC law of tweets": The answer is usually the most boring. If so, it is nav improvements that do the range calculations for you and allow you to use the car to plan a complex route. 99% chance of this. This has felt missing for a long time. I have felt it when driving. If you do the math, you can get wherever you need to go, but you do need to do that math. This update will dumb it down and make it easy.
They will add the charging partner network to the nav. 99% chance of this. Hopefully they don't overhype this since most of them are at hotels and are for guests only. So this is nice if you are planning a roadtrip and that hotel works for you, otherwise the charging partners are "meh"
What I HOPE: Announcing a charge partner arrangement with some large company with a widespread footprint: Target, Wendy's, even Mcdonalds or walmart. Starbucks is a lousy choice since many of them have limited parking or don't control their lots since they are renters. 50% of this.
Unfortunately I think above is most realistic and spot on and will be a little bit of a let down for us, but for the public this press coverage is ultimately good as it creates more awareness for Tesla amongst the public.
there is perhaps a small chance in my opinion that there could be some surprise, shorts should be buying OTM short dated calls as a hedge just incase there is some major surprise to go along with this press conference.