Google has updated Google Now with some great new cards. Voice reminders allow you to tell your device to remind you about something at a specific time. Other cards include a list of new music, movies, and book a user may be interested in and another which displays public transportation data.
Google has also added some new search features for signed in users. For example you can ask Google Now to send emails or specific photos you have saved on Google+.
These updates are live right now on Android, if they'll hit the iOS version is unknown.