In Pictures: Cool features of Microsoft Surface ta...
Unlike a traditional laptop, the Surface keyboard is too lightweight to sit flat when the screen is raised; the weight of the screen would flop the tablet over and leave the keyboard sticking up in the air or leave both the screen and keyboard flat on the table. So Surface has a kickstand that flips out of the back, propping up the screen at what Microsoft says is an optimal angle, good for viewing and for aiming the front-facing camera for video calls. While the kickstand might work great on a table, it could be challenging to use Surface as a laptop on an actual lap.
In Pictures: Cool features of Microsoft Surface tablets