As suggested by a newly uncovered Apple patent, you would be able to manipulate and control graphical elements on your display, such as icons, media files, text and images.

CNN: Apple patent uses 3-D gestures to control an iPad

The new, ultra-slim TomTom Runner and TomTom Multi-Sport GPS sport watches feature an extra-large display, full-screen graphical training tools and the industry's first one-button control to make it easier for users to access the information needed to stay motivated and achieve their goals.

ENGADGET: TomTom makes own-brand GPS sports watches, no Nike swoosh in sight (updated: details)