Even if they did, it would take all the arogant Prius drivers another 40 years to clear the smugness from their heads, and we'd still have to deal with them....
Because each new model of the Prius has shown improvements in the technology used and the environmental friendliness of the vehicle. Newer versions of the Prius will likely provide increasing mileage and more eco-friendly components (such as a new lithium ion battery pack).