I've spoken to this with multiple people already and I agree with most of what you say. It seems the uncensorable and distributed nature of the protocol is mostly applicable to people living under controlling regimes, which is really import for them, but is not a necessity for the majority of the population. Though I see 2 unique value propositions that most likely will resonate with most of the population:

- The choice of clients equaling a choice of algorithms and adds. (revenuemodels)

- The current nostr climate being super friendly and human (this might dilute with rapid adoption)

As to your last paragraph, do you have any applications in mind the are not 'replicas of mainstream apps'?

At first thought I'd say product/service inventions only made possible by the nostr protocol. I feel like the functions of the protocol invite it to be build into a system for political voting which needs to be uncensorable and distrubuted to counter corruption. It will need appropriate user validation. But as I'm not a programmer I can't say or understand for sure.