For as long as most of us can remember, we have interacted with our computers via some variation on the theme of the graphical user interface (GUI), keyboard, and pointing device. The advent of touch-sensitive displays, and their popularization via smartphones and tablets was not really a radical departure. It eliminated the mouse and clumsy stylus sure, but there seems to be obvious missing piece.
All of that may change sooner than you think. Augmented reality and virtual reality are rising in popularity as the tech continues to advance.