I hope they at least make it an option for pre June 22 refresh Model S owners. Best case (and admittedly least likely outcome), Tesla agrees to retrofit for free. Second best case, Tesla agrees to retrofit for some reasonable fee. Worst case, Tesla lies and says it's not possible because it's a new design not built into the older refreshed cars (ignoring the Munro video) to avoid arguing with all the upset early adopters who want it for free.
I saw the tilt feature advertised and it was a factor in my early order. I most likely would have bought the car anyway (and in fact took delivery so that is that) so while I don't mind paying something to get the feature (let me decide), it would be awesome if Tesla took care of this on their dime