In Pictures: Making the most of Windows 8 - the di...
Snapping apps isn't a cure-all for the one-app-at-a-time restriction. For one, snapping only works if your display resolution is higher than 1,366 by 768; it simply doesn't work with anything smaller. Also, not all apps run properly when snapped into a narrow amount of screen space. For instance, when snapped, the Metro app store only shows the store icon against a green background, not the store itself.
In Pictures: Making the most of Windows 8 - the diehard's guide