Resistance Isn't So Futile Answered
Nissan has introduced the Eco Pedal, an acceleration pedal that pushes back on the driver's foot if the driver is supplying unnecessary pressure and therefore being fuel inefficient.
From Wired News: Nissan estimates that the Eco Pedal, coupled with the already ubiquitous instant fuel readout on the dash, can increase fuel economy 10 to 15 percent.
While it may hinder driving freedom a little bit, it seems more like it's there to be a friendly little reminder. Sort of like parents when you're learning how to drive. Very environmentally friendly, fuel optimizing parents.
Nissan via Wired News