Microsoft has announced their native tablet pc for the consumer named as Surface tablet running on Windows RT and Windows 8 Pro. Surface tablets with both OS will features 10.6 inch ClearType HD Display.
The most notable inclusion in the tablet is full USB access and full desktop experience. Another features includes build in kickstand and a multi touch keyboard with trackpad.
Surface Tablet running with Windows RT will be thin and light weighted with the 9.3 mm thickness and 676 g in weight whereas the Windows 8 based surface tablet will be heavier and thicker with 903 g in weight and 13.5 mm thickness.
Windows RT surface Tablet will have the productivity software such as Office Home & Student 2013 RT whereas this software lack in Windows 8 pro. However, Windows 8 Surface tablet will give more battery backup than the Windows RT Surface.
Take a quick look of specification of both tablet PCs in following image: 
