Yes, interestingly enough, just this week we began to seriously consider Architecture/Design with him, but haven't yet looked at the Visual Arts field as a whole... thanks for that prompt. My grandfather was a professional artist, and taught me, and our son does actually have ability there too, though it's never been trained... hmmm.
Initially, Business seemed the way to go because of his strong natural drive to think/live that way - but perhaps both spheres can mix, and a new-generation Frank Lloyd Wright may emerge!!