The display assembly of the Touch measures 2.93 mm thick. That is slightly thinner than the 3.05 mm iPhone 4 display, and 30% thicker than the 2.27 mm display on the new iPod Nano.

The retina display on the 4th generation Touch is rumored to be lacking IPS, differing from the display installed in the iPhone 4. A way to test the difference is to examine an identical image on both devices at an extreme viewing angle. As seen in the second picture, the Touch (bottom) loses a great deal of contrast when viewed from a low angle.