Selecting the new “Later” option will add the purchased content to your “Purchased” tab in iTunes in the Cloud, meaning the feature is only available to those in countries that support iTunes in the Cloud (full list here). According to Apple’s knowledge base article, the option applies to content including: TV seasons, season passes, movie bundles, music box sets, or individual movies and TV episodes. expand full story
Apple has recently added a new option for iTunes purchases on both the Mac and iOS devices running iTunes 11 and iOS 6 or later. Now, when purchasing content that includes a large download, such as movies or seasons of TV shows, iTunes will allow users to complete the purchase and opt to download the file at a later time. As noted by Macworld, Apple outlined the new option, which presents users with a dialog to “Download” now or download “Later”, in a recently updated knowledge base article.