The transition to Ultra-High definition television, ATSC 3.0, could begin as soon as 2017.
It won't be compatible with ATSC 1.0, meaning technical upgrades to existing HDTV's will be necessary.
The upside is it will be able to allow broadcasters to provide additional content to tvs, online, and on mobile devices. Sinclair Broadcast Group is planning on replacing some syndicated content on its stations with news programs from their new news network.[Link: tvnewscheck.com]