If it works with just electricity and doesn't require manual human work it is a game changer. No longer limited by human resources, we can scale research in any field and improve everyone's life much faster.
AlphaGo is an example of such an approach. I don't think models will be locked down, they will probably be like go bots in recent years, about 50% of them open sourced. As long as there is an open dataset, the models can be replicated.
Also why would you think the weights for models will be open source. That isn't even true now for the most complicated models (gpt3 and the like) and certainly isn't for all the models running right now in production using proprietary datasets. As long as keeping it secret makes it more likely that you (or your models) can generate the next better model it doesn't seem very likely we're converge on them all being public
I am no longer confident of that.
Not to mention there are techniques by which training can be avoided entirely like transfer learning and others.
I'll concede that Stable Diffusion may or may not meet the threshold for SOTA but still think this is indicative of inference eventually becoming supported for any compelling LLM on consumer-grade hardware. The possibilities for creative tools are just too compelling.
[1] https://machinelearning.apple.com/research/stable-diffusion-...