What would these schools look like?
If we set up schools that tick these boxes so that they're project-based and inquiry-based learning, and we don't compare people to each other, but we allow students to express their knowledge of the material on their own terms, in their own unique voice, and at their own pace, I think we'd be setting up all students for the future much better, including those students we label gifted now.
What would surprise readers?
A bunch of concepts that I argue are part and parcel of human intelligence. Most people have not thought of intelligence in this way and that's just based on the tradition of IQ testing and comparing people to each other.