Just a quick heads up Platform Nation community. When you fire up your Xbox 360 tomorrow you will be prompted to accept a mandatory update (when you sign into Xbox LIVE). You will not see a noticeable change as this update is for additional enhancements heading our way later this year. Sounds like this is going to be a quick update so you should be playing your favorite game tomorrow in no time.
There are no new features that will show up once your system has been updated.
This update is preparation for additional system enhancements coming to Xbox 360 later this year.
Source: Major Nelson