Marques Brownlee: 'This is the Sapphire Crystal Display From the iPhone 6'

In the words of John Gruber:

Purported iPhone 6 component leak shows incredible scratch resistance and durability.

If this is real, it looks pretty impressive. Also notice that the front facing camera appears to have been moved off of centre to allow shrinking of the top and bottom bezels. Apple is making the screen bigger, but trying to minimize the overall increase in size of the device.