I don't yet know enough about ATSC 3.0 to discuss it in any detail, but it appears that the standard includes the transmission of services to mobile platforms. In rural locations, ATSC 3.0 transmissions might cover areas that have little or no cell coverage [...]
Someone would have to build the receiving capability into new devices. We're not just talking new TVs here. TVs might not even be a significant factor in the ATSC 3 device mix.
Tell that to everyone who's been trying to get FM radio tuners into mobile devices for over a decade. It won't happen, for a few reasons.
First, the phone manufacturers have cozy relationships with the mobile carriers, who make lots of money from streaming data.
Second, the major smart phones are sold globally, and the manufacturers will not have any interest in including a television chipset that will only work in the United States and South Korea.
Third, perhaps the biggest obstacle to portable ATSC 1.0 sets is not the encoding, but the power consumption. A modern smartphone with a modern ATSC tuner chip might last two hours before draining the battery, and I think I'm being generous. I haven't read anything to make me think ATSC 3.0 will be substantially better in this regard.
Finally, I wouldn't believe the reception claims until I saw them demonstrated in a portable unit, maybe 20 miles from the broadcast facility and with the receiver indoors or in a moving vehicle.