Are you thinking of the Heads Up Display stuff? Pretty nifty I thought, makes me wish I had a Computer\Brain interface ..
With software like After Effects, that would be pretty easy composting. I like the bit where he picks up the cell phone and gets an overlay of its current status...
You can see something similar in Fight Club near the beginning, as the main character is describing picking just the right sofa.. its not a HUD, its more like a IKEA catalog.. neat effect..