Google Now has had some great success for Android, as well as of iOS and Chrome. It looks like it might be jumping from your smartphone onto your desktop, by being added to the Google's home page as shown in some recent tests and screenshot. This means that the timely information that Google Now offers could be available at home too.
From your desktop computer, you would be able to edit your home, work and current locations, which would then give you relevant information about the weather, traffic conditions and nearby places. Another aspect that it could include is tracking your favorite stocks.
Apparently it will take on iGoogle's functions and will present you with important notifications from other Gmail, Google Calender and Task Planner, so that you'll always be on top of meetings, birthdays, travel dates, just to name a few. There would also be a tab for customizable information for your own personal interests.
How Google Now will be integrated or optimized for the Google's start page is yet unknown. Perhaps integrating Google Now is a way to dissolve iGoogle, a service that hasn't proved to be very popular.