As utterly impressive as this is - unless they have perfect information security on every level this technique and training will be disseminated and used by copious competitors, especially in the open source community. It will be used to improve technology worldwide, creating ridiculously powerful devices that we can own, improving our own individual skills similarly ridiculously.
Sure, the market for those skills dries up just as fast - because what's the point when there's ubiquitous intelligence on tap - but it still leaves a population of AI-augmented superhumans just with AIs using our phones optimally. What we're about to be capable of compared to 5 years ago is going to be staggering. Establishing independent sources to meet basic needs and networks of trust are just no-brainers.
Sure, we'll always be outclassed by the very best - and they will continue to hold the ability to utterly obliterate the world population if they so wished to - but we as basic consumer humans are about to become more powerful in absolute terms than entire nations historically. (Or rather, our AIs will be, but til they rebel - this is more of a pokemon sort of situation)
If you're worried, get to working on making sure these tools remain accessible and trustworthy on the base level to everyone. And start building ways to meet basic needs so nobody can casually take those away from your community.
This won't be halted. And attempting to halt would create a centralized censorship authority ensuring the everyman will never have innate access to this tech. Dead end road that ends in a much worse dystopia.