The blurry, transparent background in Notification Center, Control Center, Spotlight and other more options menus on iOS 7 device can make reading experience rather unpleasant.
You would expect the North Pole to be all white, covered in snow and cold, but not at the moment, as the North Pole literally turned into a lake. Global warming or natural process?
You can add multiple desktops to the Mac OS X Mountain Lion by using Mission Control, formerly known as Spaces. Can be really useful if you are a busy multi-tasker.