The next step for the Advanced Television Systems Committee is to chose an audio standard for the ATSC 3.0.  It will involve enhance surround and the 'personalization' of sound.
Dolby Laboratories, DTS and the triumvirate of Technicolor, Fraunhofer and Qualcomm have each developed a system.  After one of these are chosen, it will have to receive FCC approval.

[Link: tvnewscheck.com]