They didn't say infinitely large in every direction. If you're on a Mac now, try quickly hitting the menu bar items (at the very top edge of the screen) vs the

They didn't say infinitely large in every direction. If you're on a Mac now, try quickly hitting the menu bar items (at the very top edge of the screen) vs the tabs (below the menu bar, not quite at the edge). I find the difference quite significant. Peculiarly, this convenience would flip to the opposite if the screen were touch-enabled!