what is the new iOS 7 feature called "swipe to capture" On this site Apple praises the new feature "swipe to capture"


  With a swipe, you can capture what you want the way you want. (2)


And then noting in the footnotes:


  (2.) Square and video formats and swipe to capture are available on
  iPhone 4 or later, iPad (3rd generation or later), iPad mini, and iPod
  touch (5th generation).


Now my questions are:


What actually is this new iOS 7 feature? How can I use it?
Since there is a footnote for this, stating that is not available an all devices, what iOS7-compatible devices do not have this feature?
The iOS7 update enabled Swipe to Capture – allowing you to switch between camera modes like Photo, Video, Square and Panorama with a swipe.

The iPhone 5, iPhone 4, iPhone 4S, iPad 4, iPad 3, iPad mini, and 5th-gen iPod touch have this feature, while only the iPad 2 does not.