I hope that's a prototype design and Apple has more plans for it because from what I'm seeing, that phone looks hideous in every way. getting rid of the flat sides for a curved one might not have been a good idea since the phone now looks like a blown up iPod.
All I can say at this point is - ugly. I did say the same about iPhone 4 renders, and they turned out rather nice in real life, but at this stage, I don't see how iPhone 6 will look any good.
These "3D renders" can be made with Solidworks in 30 minutes. With the (old) leaked dimensions of the device, it's a piece of cake.
The third, middle picture would be more complex to make in Solidworks, but still it could be done in 2 hours...
Wow, I could have done this and be in the news on all phone/tech websites lol