mhays, at one time Victorian era architecture was reviled. Now it and other pre-War styles are adored for their historicity. To think modern architecture and its variants (like brutalism) won't experience a similar resurgence among the hoi polloi at some point in the future ignores the cyclical nature of popular taste.
It's also important to remember that the "members" of the "cult" (?) you deem irrelevant often shape popular taste, if I correctly understand your use of the word. Depending on the medium/industry, it may take a few seasons or years; regardless, whatever the masses end up gravitating towards (in food, fashion, art, architecture, etc.) is usually some version of what a much smaller, more forward-thinking group of people picked up on much earlier.
Anyway, all that really only matters if we accept your premise about brutalism, but, considering how off your assessment of New York's Standard hotel is (based on the critical acclaim of the design and its economic success), we don't really have much reason to.