I didn't see this mentioned yet, but I just came across the "iloome screenmate" tempered glass.
According to the website, it's tempered glass that forms to the rounded edges.
I have no experience with this company at all, nor have I tried the screenmate yet (they're listing the release date as 9/25/14 for iPhone 6 and 10/5/14 for iPhone 6 Plus, and I'm posting this 9/24/14) but it looks like, if nothing else, companies are finding a way to make the rounded-edge tempered glass solution to satisfy the iPhone 6 aesthetics...
I'm going to order one and report back...but does anyone have any experience with any of the iloome products?
this is where I found the screen protector (24.99 pre-order):
http://www.iloome.com/iPhone-4-7-Screen-Protector-Tempered/dp/B00NB9CPTG
and looks like you can pre-order on amazon as well (24.99 pre-order):
http://www.amazon.com/iloome-ScreenMate-Tempered-Protector-Oleophobic/dp/B00NB9D E7I/ref=sr_1_1?ie=UTF8&qid=1411569900&sr=8-1&keywords=screenmate+iphone+6