Geez people nothing, Fierce.  I think the whole concept looks stupid, personally.  I didn't say that before, but it's true.  What is it ultimately going to take to give people the biggest thrills of their lives, before they finally say they've had enough?  People - especially coaster buffs - get so worked up over height, and speed, and new gimmicks, and it is only because they are getting bored with what is already out there.  Doesn't anyone remember a time before all these new concepts came out, and you couldn't wait to ride a regular sit-down double looper?  People get bored way too easily these days, and don't appreciate that which they already have.  When I was a kid, they didn't even HAVE any kind of looping coasters.  But it was a scream for me to get to ride a wooden coaster that was only 60 feet high. 
I don't mean to preach, but get a grip, people.  All these fantasies about coasters that flip this way, and turn that way, and soar to 500+ feet at 150mph.....it's all nuts!  What will it take for everyone to get their ultimate high? 
 
JUST MY OPINION, okay?  Don't go flogging me!