There is a lot of speculation about object based audio on film soundtracks for the home. However in spite of the supposition on some writers' part, there is no evidence that a Dolby Atmos cinema mix can be decoded by an Atmos Home decoder. A re-mix will need to be done for home Atmos and at an added expense for the studio. Plus, I would expect the audio payload to be 30-40% larger for an Atmos enabled mix relative to the TrueHD 5.1 or even 7.1 mix of the same film. This makes it less likely for Atmos mixes to appear on regular Blu-Ray discs (unless the studios delete some supplemental material.)

While the barrier to Home Atmos is relatively low for consumers, it remains higher for the studios.

Meridian Advocate