Sure, USA has a lot! That's not at discussion here. The discussion is about dominance. SV dominates the world as everyone uses Google, Facebook & Apple. The military industrial complex has no match, not one even close to that of the USA.

The economy has strong contenders with Europe and China. Yes, it's a strong economy, but the maker-industry has largely been moved to China, which now surely dominates it. Point 6 & 7 include economy.

Hollywood surely tops any other in the western world - don't underestimate the Chinese movie industry and Bollywood. They account for a significant userbase of the world population, combined ~1-2 billion. That's not far off Hollywood's.

The video game business I bundle with Silicon Valley.

What's left is a strong and influential USA but declining slowly but surely. For Silicon Valley as well: India and China have a large population now with more and more skilled workers. It won't be for long until SV will lose is leadership position.