One of the new features of iCloud that was announced at WWDC but was slightly overlooked by bloggers and iOS users is Photo Stream. Built into the native Photos app for iOS devices, iPhoto for Mac and the Pictures folder on Windows PCs, Photo Stream will allow you to automatically find on any device the photos you’ve taken on an iPhone, iPod touch or iPad. With the addition of the Apple TV 2nd gen, Photo Stream will let you watch these photos on the bigger screen with your friends and family. How does it work? For those that missed the announcement, here’s a quick recap: because iCloud automatically stores, updates and pushes your content on all your registered devices (be them iPhones, iPads, or Macs and PCs running the iCloud control panel), Photo Stream acts as an extension of the mobile Camera Roll that, rather than just storing pictures locally, also pushes them to the cloud as soon as they’re taken, provided you’re on a WiFi connection. If you’re not on WiFi, Photo Stream will upload the photos from the Camera Roll to iCloud as soon a a new connection is established.

As explained by Steve Jobs on stage, and later demoed by Eddy Cue, the main purpose of Photo Stream is that of easing the process of importing photos shot on, say, an iPhone to an iPad or Mac for better viewing. With previous versions of iOS, users were forced to email pictures themselves and open the message on OS X to save the photos (facing at the same time a risk of quality loss due to email limitations); create an account on social services like Flickr or Facebook to upload photos from their mobile devices to avoid a desktop transfer process; even worse, users had to go home, find a USB cable, connect their iPhone to a computer, launch iPhoto or Image Capture and manually import the most recent photos. That’s a long and tedious process Apple wants to eliminate with a smart, automatic system that always puts the most recent photos on all your devices. In fact, Photo Stream can display the 1,000 most recent photos on iOS devices, whilst files are stored on iCloud for 30 days due to storage limitations on both ends (iOS and Apple’s server farms). On desktop computers, which come with more storage, Photo Stream stores all photos. Again, this new functionality works out of the box with any iOS 5 device configured with an iCloud account, and Photo Stream can be enabled in the Settings app. On the desktop’s side, right now Apple is requiring developers to download a special beta version of iPhoto and the iCloud control panel to test Photo Stream, but once iCloud publicly launches this fall everything will be baked in with no further configuration needed.
Read more