We saw a screen shot for the control panel entry for Windows 8 Roaming Profiles, and today we a set-up screen where the feature is explained to first time users.
According to the screen the Single Online ID allows users to have their personalized Windows Settings, Personalized experiences for your programs, sign-on settings for websites and apps and have easy online password recovery.
From the Control panel screen we know the service will allow users to take your desktop wallpaper, accessibility and language settings, application settings and search settings and also taskbar, explorer and mouse settings to any new computer.
Users will also be able to take their saved WIFI and website credentials with them, meaning your saved passwords will travel with you from computer to computer.
Source: Windows8beta.com via Compixels.com