In reply to Emphasis on other scripts:
>I don't think asking for capitalization in monocameral scripts is outlandish (and I have seen a nice proposal for adding capitalization to Arabic).
I'm not convinced it works too well in Thai, but it's getting rather common in things like movie titles and brand logotypes. Here's one for 'Caribbean Home', with the ko kon uppercased:
Maybe I dislike it because it's so badly executed.