I agree, but the lack of ability to monetize or own your property is probably going to keep dreams from ever realizing its full potential. Making a really ambitious game will take thousands of hours, and almost no one is going to do that for absolutely no possibility of gain. At some point they'd realize their ambition and how serious they are and take things to Unity or UE4, or more often the type of creator who wants to make a fully fleshed out, finished game wouldn't see Dreams as a valid path to begin with because it can't be monetized.
I expect we'll only ever see cool demos, proofs of concept, experiments, and small fan games