This is not the question Apple is trying to answer. If you're trying to expand the market of a company with such a broad reach already there aren't many market

This is not the question Apple is trying to answer. If you're trying to expand the market of a company with such a broad reach already there aren't many markets big enough to move the needle on revenue. Real-estate, food, fashion and automotive are the only ones really significant enough to tackle, and of those, automotive isn't an unreasonable one to explore. Unless you want a literal Apple Home.