He doesn't have to move it. It reassures them that a touch has registered. 3-D button effects are ideal. Be sure that the display clears immediately and shows an hourglass while the next screen loads. Make your application fun and fast.
Users walk away from sluggish systems.
Speedy systems also reduce vandalism. High resolution graphics slow down the system and may not be necessary. 256 colors is typically more effective than 640x80 resolutions. Test your application on focus groups. If users pause in confusion even for a moment you ve identified a problem.