Where there is smoke....Interesting update. The X91J specs now show that VRR and ALLM are working out of the box (at least on their website). I've been checking that page every day, and I swear there was an asterisk next to them saying that they will be available in a future update.
Edit: Asterisk removed on the X900H specs
Edit 2: Asterisk gone on the X90J and X85J as well.
I suspect an update is coming soon!