The new iMac design is said to include a profile that when viewed from end to end, you "almost cannot see the new iMac's thickness." The poster compared the profile to water droplets and said it included "tetragonal" elements.
It appears the display is glued to the machine's front glass rather than a separate assembly, although the post doesn't mention whether this will be a Retina display. The post also wrote that the iMac will retain the familiar "chin" below the display.
Stephen Hackett called it.