Of the three alleged prototypes, the source says there is one with a design
inspired by the GALAXY S 4 flagship handset, another with a completely new design (breath of fresh air and all that), and a third that features a flexible display, which is the one that sounds most intriguing. The prototype that draws its design from the S 4 is featured in the concept above.
Different rumors have been popping up lately regarding the Galaxy Note 3, such as one that hit the Web a few weeks ago claiming the device will sport a new design, which is what one of the three prototypes at Samsung are rumored to have. Specifically, word has it the design will utilize metal in the place of plastic. Such a claim automatically brings one around to thoughts of the HTC One.
The rumored new design and GALAXY S 4-inspired design aside, the third concerning a flexible
display design is the most interesting of the three. This seems to match up with a rumor we heard earlier this month
that the Note 3 will feature a super-durable plastic display that is harder to crack than current offerings. For now, all remain the stuff of rumors, but if one of them proves to be true, we’ll know in September when it is believed Samsung will launch the device. - Slashgear
I've been waiting forever for this phone.