What is Eberrons high concept?
Good question. A “high concept” usually refers to a brief phrase that can be used to sum up a setting. So Dark Sun’s high concept might have been “post-apocalyptic fantasy” and Spelljammer could be described as “D&D in space.” Note that these leave out a lot of important details, but the three-word description is apt. Eberron — at least based on what we know now — is not as focused on being high concept. It is not an attempt to create a new type of fantasy. It isn’t something that you can sum up with a pithy comment like “Final Fantasy meets Indiana Jones.” It’s a new setting that incorporates ideas that have become popular in modern fantasy, but the new ideas are no more important than concepts as old as magery and orcs. Eberron is very distinct from other D&D settings, but what sets it apart is a deepened level of nuance and thoughtful worldbuilding.