There's definitely room for laggy, non-interactive 3D views in just about everything. Pick anywhere is space to display a clock/calendar you can glance at. Draw with the mouse and keyboard but see it rendered on your desk. Overlay keyboard shortcuts for the new program your learning on your real keyboard. Show a battery level overlay on the cell phone on your desk. Overlay the title of the song currently coming out of the speakers you're looking at. Overlay the estimated calories of the meal you're eating. Animate the solution to the puzzle sitting on the floor.
