Indistinguishable is only a slight exaggeration, though. While it may not look identical to a Marriott, if a hotel that looked exactly like the Riviera was built in any relatively major city it would blend right in (there are already buildings here in Atlanta that look quite similar). There's nothing about it that stands out as unique or different to the ordinary, which is the problem I have with it.
As I said, if you don't care if a hotel is themed, then that's fine -- there's certainly nothing wrong with that. What becomes silly, though, is when people argue that there's no difference between it and the standard Disney previously set, though.