At the time it was launched, there were a lot of new features in i Movie '11 that made quite a big splash.
Final Cut Pro Mar 25, 2010 This update improves reliability when working with videos from Aperture.
This update is recommended for all users of i Movie 09.
Included with the latest version of i Movie is the i Movie Theatre, a new service that allows you to view all of the movies, trailers and clips you create in i Movie on any of your devices linked to Apple’s i Cloud service. If you have an i Cloud account, movies sent to the i Movie Theatre will automatically appear on all of your i Cloud-connected devices, including other computers, i OS devices like the i Phone, i Pad and the Apple TV. First you need to ensure that you are connected to i Cloud 2. Sign into i Cloud if you’re not already and select Documents & Data 4. Be aware that movies, trailers and clips uploaded to i Cloud can’t be longer than 15 minutes. It costs £2.99 or is a free update if you already own the original i OS app. Once you have edited your i Movie tap the video clip or project you want to share. If you run out of space in i Cloud, Apple will alert you via an icon that appears in the top-right corner of the movie indicating you can’t upload new movies.
i Cloud makes it possible to access content that you have stored on servers in Apple's 'cloud'. Click the Options button next to Documents & Data 5. You automatically get 5GB of i Cloud storage for free.
I mainly decided to install to stop the App Store from nagging me about it.
EDIT After a number of calls to Apple Support, and a solution which didn't work I was given a redemption code to install the new version.If you're running a system prior to OS X 10.9, you might consider updating it.Upgrading Apple's i Apps from the 2011 versions to the 2013 versions requires either Mavericks (for version 10.0.5) or Yosemite (v10.0.6). It took about 30 seconds for the i Phone i Movie to upload on our Mac. Unlike with Photo Stream which allows you to share your photos with friends, i Cloud Theatre can only be shared with other devices connected to your i Cloud. If you wish to view the movie on your i Phone or i Pad you will need the latest version of i Movie for i Phone or i Pad. In i Movie for i Phone or i Pad tap the Theatre icon at the top of the screen to view the i Movies you have stored in i Cloud. To view i Movie Theatre on an Apple TV choose i Movie Theatre from the main menu. The i Movie will appear in i Movie Theatre on all your i Cloud linked devices.When it launched in October 2010 was part of the £45 i Life '11 package, i Movie '11 then became available to purchase separately on the Mac App Store in January 2011 with a price of £10.49.