T-Mobile's two big new breakthroughs are aimed at saving lives rather than money

That may sound pompous or hyperbolic, but we can probably all agree that the "Un-carrier" is right in deeming "every second" as vital in emergency situations. Thus, Magenta's Location-Based Routing (LBR) technology could well prove a literal lifesaver for some people, allowing the network to connect more 911 callers "directly to the appropriate 911 call center."
As the name suggests, Next Generation 911 might be an even bigger deal, and not just because T-Mo has already managed to establish "some level" of this groundbreaking technology in "all or part of Delaware, Massachusetts, Michigan, New Hampshire, North Carolina, Pennsylvania, South Carolina, Virginia, and Washington State."
Obviously, the long-term plan is to expand all this stuff across the nation, and knowing T-Mo, the second-largest wireless service provider in the US would probably like to do that before Verizon and AT&T even manage to unveil their competing next-gen 911 systems.