When I first got my Prius 4 years ago, I was completely transfixed by the real-time MPG display. Multi-scale feedback! I could see my mileage per tank, in 5-minute increment, and moment-to-moment. I experimented with my driving style, trying to beat my "high score" each day.
I've mellowed out since those heady first days, but I still pay attention to my mileage - and I'm happy to see that others are noticeing the game-like quality of this kind of display. Games are great at motivating behavior - and if we had more MPG feedback, I'll bet that people would drive in a way that would reduce emissions.
In this era of sharp political and religious divides, we can surely agree on one thing. Constantly watching the mileage measurements on the Prius's little video screen is really a mobilized video game. It's NOT simply driving a car. How long can I coast and keep the mileage at "99.9?" If I use engine-braking down this slope, how much can I re-charge the battery? I did 48.9 MPG the last time I drove to Oregon, can I beat it this time?
Admittedly this is a bit of a cerebral game. No droids or monsters. No explosions or body count. And I have the advantage of living in San Francisco with its extreme topography. Perhaps this game would a little less exciting if I were in a flat place like Ottumwa. But it would be even more subtle and challenging. Prius is surely the most expensive, biggest gaming machine built...so far....