Microsoft recently announced new ultraslim Wedge keyboard/mouse for tablets and Sculpt keyboard/mouse for mobility and comfort. These are optimized for Windows 8 and work with a variety of other devices. Bluetooth across the board removes the need for usb dongles and cables.
The cover protects the keyboard and also functions as a tablet stand. A Bluetooth connection provides a wireless, clutter-free connection.
At this point, the business and retail models are just packaged differently.
dimensions: 12.4″ x 10″ x 6.5″
The Wedge Touch is also built for tablets and features gestures to shortcut around spreadsheets, webpages, and documents. It is compatible with Windows and many Android devices.
dimensions: 2.4″ x 2.1″ x 0.9″
dimensions: 13.9″ x 6.54″ x .73″
The Sculpt Touch Mouse features a touch strip to quickly navigate spreadsheets, webpages, and documents using flick or scroll gestures. The mouse utilizes Bluetooth connectivity and is compatible with Windows as well as some Android and Apple devices. BlueTrack Technology works on more surfaces than optical and laser mice, meaning scrolling is accurate over carpet, wood, couches, and clothing.
dimensions: 2.56″ x 3.76″ x 1.32″