Windows 8 will introduce some new features allowing parents to better monitor or filter website visitation by their children. Each child can be setup with a user account that parents can customize controls to help ensure greater safety.

Windows 8 – New Family Security Controls
http://blogs.msdn.com/b/b8/archive/2012/05/14/keeping-your-family-safer-with-windows-8.aspx

QUOTE: One of the intrinsic capabilities of Windows 8 is the ability to use multiple accounts on any PC. This makes it much easier for parents to use tools that can help protect their children from content on the Internet as they see fit. It is also a great way for each family member to maintain their own unique online identity while still sharing a single PC. Microsoft has been a leader in creating tools to help maintain a safe computing environment for all users as well as for parents in particular. With Windows 8 we have substantially improved the family safety features and services available.