You're probably right, sadly. The best case we could reasonably expect would be better quality streams, but I don't seriously believe that will happen either.

There are some niche services like the one that you can only get on Sony TV's that stream at like 50% of UHD bluray's bitrate - and that might be as good as it gets for the foreseeable future unless these services are forced to compete on quality or people decide to care about 8k or something.