For the App Screen aka "Start Screen":
- Remove the useless "Start" header, take advantage of that newly available space by putting the user name there instead
- Put a magnifying glass icon in the upper right corner, activates the search charm/ all 'app apps' view
- remove the "all apps" entry from the app bar
- put a Settings/power icon in the lower right corner, activates the settings charm (which includes power options)
- Put an option to boot directly to the desktop into the App Screen Settings (turned off by default, I guess)


Benefits: Takes one click to show all apps or search or reach the settings and power menu, all easily discoverable. Give the user the choice as to whether he or she wants to skip the Apps Screen after a system start.
For Metro apps:
- Button and Keyboard shortcut for putting apps into a a window (possibly enforce minimum window size equal to minimum resolution for Metro apps, or equal to a minimum resolution as specified by the app creator – promote responsive design)
- put full-screen button in a modern app's title bar to set it back into fullscreen mode
- Make an app-specific search field or button mandatory, always in the upper right corner of the app
- Make a settings button in the lower right corner of an app mandatory
Benefits: Searching and app settings easily discoverable and clearly pertaining to the current app, improved multitasking due to windowed usage
For the Desktop:
- Put a settings/power icon on the bottom or far right of the task bar, activates the global/Desktop settings charm
- Put a magnifying glass icon in the upper right or lower left corner, activates a windowed search menu
- remove windowed Metro apps from the multitasking bar on the left
- show active/most recently used/pinned modern apps in the task bar
- Charms bar applies to the active app
- allow the 'Charms' bar and its hot corners to be deactivated
- the Share charm can be activated by clicking on a window title
- Allow integration of the Share charm into Desktop apps


Benefits: Settings/Power options easily discoverable / task bar can be used to switch between any kind of app / Charms bar hot corners don't interfere with Desktop usage / share charm becomes more useful and usable
For the Charms bar
- (optional:) remove the Search/Settings/Devices/Start charm, integrate the functionality of the Devices charm into the Share charm
Benefits: Sharing (to/with people or devices) always just one finger slide from the right away. Search and Settings reachable via the app itself, Start button unnecessary
For the new windowed search 'not quite Start' menu :
- Make a link to the App Screen the first item (as Start8 already does)
- Allow the user to select between a list of either recently used or frequently used apps or files
- put a button next to the search box to go fullscreen - activates the 'all apps' view/search charm

Benefits:
Windowed search option and most recently/frequently used apps/files list brings back important search menu functionality / user's choice whether fullscreen or windowed searching is preferred








