ATSC 3.0 and the Perennial Transition. http://www.jdsupra.com/legalnews/ats...nsition-48536/

Step 3 – Growth and Expansion. ATSC 3.0 was designed to be flexible enough to be in use for decades. But broadcast service won’t be static for all those years. Broadcasters will finally be able to upgrade and extend their signals to cover areas that have been unserved for decades. Because SFNs are far more efficient users of spectrum, things that seemed impossible or impractical with older technology are attainable with 3.0. Over time, SFNs may allow broadcasters to extend coverage to the edges of their markets in many cases, and provide service between population centers along major traffic corridors.