You plan to upgrade to Windows Phone 8 or have a Lumia Windows Phone Signature or more of your iPhone? Pass Wallet is a free application that allows a Smartphone WP8 open files .pkpass Pass Wallet in Microsoft.
There is not (yet) Simple way to duplicate a complete Passbook an iPhone to a phone in another OS, but Phone Wallet can perfectly open passes for Passbook downloaded in the browser or e-mail attachments. The opportunity to remember that these passes are only simple archives with the most important information is contained in a JSON file.
Their reading is well documented, and is therefore perfectly capable apps to manage on most platforms. Note, for example Pass Wallet on Android not only displays the channels as on iOS, but can even put them on the home screen as widgets.