Yesterday Apple showcased iOS 5, Mac OS X 10.7 Lion and the New iCloud Service. While IOS 5 won't officially be available until this Fall, Apple has already turned on the "Purchased" button in the App Store, iTunes Store and iBooks Store of your iOS devices! This means that you can easily download songs, books and Apps on your devices that were purchased on your other devices. But wait, it get's better! If you go to your iTunes Store Settings in the Settings App you can even turn on Automatic downloading for Apps, Music and/or iBooks so that any new purchases you make on any of your devices is automatically downloaded to any of your iOS Devices. I tested this by downloading a couple of Free iPad apps on my MacBook Pro. They immediately started downloading on my iPad too. Sweet!
You can watch the Apple/Steve Jobs WWDC 2011 Keynote here.