"What can it do that Windows can't?" That is the first question many people ask when considering Linux for their desktop. While the open source philosophy that underpins Linux is a good enough draw for some, others want to know just how different its look, feel and functionality can get. To a degree, that depends on whether you choose a desktop environment or a window manager. If you want a desktop experience that is lightning fast and uncompromisingly efficient, foregoing the classic desktop environment for a window manager might be for you.