What's the mood on something like the Unicode 6 regional indicators (see http://std.dkuug.dk/jtc1/sc2/wg2/docs/n3727.pdf) when the support stabilizes? e.g. 🇺🇸 (U+1F1FA U+1F1F8) can be displayed by the user agent as the letters "US" or a United States flag but the choice is up to the UA rather than the developer.