With its foray into tablets, Ubuntu introduces Side Stage, a feature reminiscent of Windows 8 that permits phone and other apps to occupy less than the full screen and keep running normally. Shown here is a video conferencing app alongside a browser-based Word processing document. Other app pairings mentioned during the briefing included those for Facebook, Twitter and note-taking. "Apps can declare which form factor they're compatible with," said Shuttleworth. "Most tablet apps [will be able to] run full-screen, or split screen with Side Stage."