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Windows 10 or Ubuntu: Which will be the one OS to rule them all?

Instead of operating systems and applications having a single interface, apps will alter their look and controls to reflect how they are being used. For example, a UI that favours large, easily-tappable buttons on a touchscreen tablet might switch to tightly-packed icons when the tablet is used with a monitor and a mouse.

The idea was dubbed convergence by Canonical, the company behind the Ubuntu operating system, when it launched the idea for a phone that would double as a PC in 2013.