From the story: “Many of the issues have been resolved, and operators, network equipment providers, middleware, chipset and device vendors now know what is required.”
I see no mobile device vendors apart from Huawei — which I suspect is much more interested in peddling network equipment — among the Alliance's members. And the only chip vendor is Qualcom. If Qualcom has indeed been shaking Apple down, Apple's not about to lead the charge into a technology for which Qualcom is the gatekeeper, even if the Alliance's many network provider members are hot for it. (Apple's consumer-friendly policy on iPhone updates is an earlier example of it staring down network providers.)