I love my Nexus 7. I have multiple Windows Phone, iOS and Android devices (and develop for all three), but for me, the shared, non-sandboxed file system on Android is the huge productivity win (despite the security risks). It's very easy to copy files in and out using SMB, ftp, Dropbox, etc. and then use them in apps. Intents for different data types are also mostly a win for Android compared to iOS URL schemes, though Windows 8 / Store 'contracts' are pretty well-designed.