There won't be a complete Unicode environment (OS, all applications working with files, communication protocols) in near future. By storing data with filenames containing non-low ANSI characters you risk losing your data.
It's not that you only need WinNT and one video player. At some point you might want to transfer files via P2P, FTP or other protocols, store those files in different mediums to be then read on non-Unicode systems. If you or another peer on P2P wishes to search for those filenames, he must be able to (1) enter the special chars you have used, (2) cheat Unicode so that at the end there won't be plain question marks transferred.
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