Apple's iOS 9 Unveiled at the WWDC and how to get it

Mobile tech gaints Apple, Inc earlier today unveiled at their highly anticipated WWDC keynote event.
There are two themes to this year's update: a Snow Leopard-style series of behind-the-scenes performance tweaks as well as a raft of new "intelligent features." The first is pretty understandable, while the second looks to bring some of Google Now's much-trumpeted smarts to your phone and tablet.

Highlights of the significant changes and upgrades brought to the OS include (but are not limited to):

• A smarter Google Now-esque Siri:
  
  "Should you only listen to audiobooks on your morning drive to work, the phone will know to resume playing A Farewell To Arms on your way home. It's a similar situation at the gym, so when you plug in your headphones on the treadmill, your exercise playlist will be offered up." - an engadget extract
•  Split Windows on the iPad
  
  Now, users can see and run two apps at the same time, as well as watch video picture-in-picture while you scroll through your emails or hang around on Twitter.
  
• Size
  
  The new OS kinda light weight something the Android L has been praise for and is seen to require less space on your Apple device unlike the previous OS.

Apple users interested in the OS can sign up to a public beta that;s expected to kick off early July. As the OS will be made open to the public as a free upgrade later in the fall, presumably with some new smartphones.