Here's another million dollar idea, use a computer's webcam to track user's eye movements to see where they are looking on the screen. With that there will be many ways to improve their experience, distractions can fade away, scrolling can be enhanced, different things can be highlighted, it would be some great info for a computer to have. This would be especially useful for systems with multiple monitors. People would freakout some, but if it's not recorded and it's useful it would be accepted.