I guess I take a pretty different view of technological progress. IMO, a lot of technological breakthrough is basically just waiting around until the underlying technologies are ready.
The original iPod was only possible because one of Apple's suppliers happened to make a 1.8" disk drive. iPhone and iPod were only possible because flash storage, batteries, screens, and mobile processors all got to a point where the original iPhone was (barely) viable as a product. Apple can't just will that the underlying technologies which will make autonomous cars or AR glasses possible come into existence now. They can nudge things a little here and there, but, for the most part, they have to wait just like everybody else.
Regarding Tim Cook: my take on Steve Jobs is that his most recognized success at Apple was creating the best products in the world. His collaborator for this was Jony Ive. But he had another accomplishment that is much less recognized: he put a tremendous amount of energy into building Apple the company. His collaborator for this was Tim Cook.
IMO, while Tim Cook may not be a product visionary, I think he is unrivaled as a business visionary. Calling him merely a "good" operator does the man a tremendous disservice. Nothing about the way Apple operates is typical. Their organizational structure is almost unheard of for a company of their size, they refresh almost their entire product portfolio every year, they release 3 new operating systems every year, they rarely make acquisitions, but when they do, it almost always works out. They have built an utterly dominating advantage in mobile processors. Etc, etc.