Turn by turn driving directions: Apple may have ditched Google for maps and introduced driving directions on the iPhone 4S and iPad 2, but Android users have turn-by-turn navigation on all devices already. Nothing new there, but you can try another turn-by-turn navigation app if you’re looking for a new experience.
Unique account signatures: The Gmail app already has this feature. The stock IMAP mail app and K-9 Mail, our favorite Android email client, also support it.
System-wide Facebook and Twitter integration: When you install a Twitter client or a Facebook app in Android, it adds itself to your default share menu, so this is one Android users have had for a very long time.
Priority Contacts: Gmail’s Priority Inbox duplicates this feature nicely, and can be turned on for individual accounts in Android so your “Important” inbox is the default inbox you see when you open your email.