The Las Vegas convention center played host to NAB, the titular trade show of the National Association of Broadcasters, last week. With the latest in television technology on display, a notable development over the past year has been the attempts by TV infrastructure networks to expand into providing data connectivity services. The ATSC 3.0 standard, with its consumer-facing NextGen TV brand, has been the driver of this new interest. Oft-delayed, ATSC 3.0 is now gaining some momentum in the market, but skepticism remains regarding its ability to catch-on. Still, the satellite and cable pay TV options are on the wane, and a model based on terrestrial antenna broadcasts can make some significant environmental claims about its efficiency. The US is…