In FF's case, the CGI cutscenes have always been absolutely stunning. If they used realtime graphics, you'd still get "useless cutscenes" (you can't control them , u just have to sit and watch), but without the eye-candy turned up to ridiculous levels, especially in the last 4 instalments.
If you're against un-playable cutscenes, that's fine, but to be honest, if i had to choose between sitting for a few seconds and watch "something" to convey the story, i'd watch a luscious CGI cutscene and not something that is limited to what the hardware can do. You still have to wait till they end, might as well look as something REALLY pretty.
In a perfect world, we wouldn't need cutscenes, but that's a completely different discussion.