Hmm... I'll try to say some rides that haven't been said earlier:
Giga Coasters. Though, I bet there are about two or three parks in the world that would be able to get one, within the next ten years.
Terracoasters look generally awesome. No wait, did I make that plural? There is only one of them built so far. But I think the world houses less than ten potential buyers at the moment, all of which have many other rides they could/would buy instead.
Any coaster with a Norwegian Loop is instantly worthly of a mention.
WingWalkers look awesome, but... I'll leave it at that.
And Ingested Banjo, TusenFryd just got the biggest Pendulum ride at this side of the Chinese border. And it really, really rocks. Watching the ground 40 meters above you is a must-experience.