[Manu Gerber]

If the bussing and output system gets reworked, why limit yourself to 9.1? It's very likely we are heading towards a more open format with game and cinema sound, where mixers can choose the best sounding format and speaker layout for the project, not the one format that's dictated by a single company. With Auro adding object-based mixing, it will become a sonically superior format than Atmos anyway, so adding 11.1 / 13.1 busses now would be a very smart move.