Apple didn't list IPS (inter plane switching) as part of the iPod touch 4 specs for a reason -- the iPod touch 4 screen, while LED and "Retina Display" 960x640 resolution lacks the IPS technology of the iPhone 4 display.

IPS, which Apple has rolled out for everything from iMac to iPad to iPhone 4 provides a much greater viewing range than a standard display.

So the still camera isn't the only step down when you go from iPhone 4 to iPod touch, but does anyone out there care as much about IPS?

[Engadget]