> AI is about centralisation of power > So basically, only a few companies that hold on the large models will have all the knowledge required to do things,

There are open source models and these will continue to keep abreast of new features. On device only models are likely to be available too. Both will be good enough especially for consumer use cases. Importantly it is not corporations alone that have access to AI. I for-see whole countries releasing their versions in an open source fashion and much more. After all you can't stop people applying linear algebra ;-)

There doesn't appear to be a moat for these organisations. HN users mention hopping from model to model like rabbits. The core mechanic is interchangeable.

There is a 'barrier to entry' of sorts that does exert some pressure or centralisation particularly at scale. It conveniently aligns well for large corporations and it is that GPU's are expensive and AI requires a lot of processing power. But it isn't the core issue.