There is no guarantee that adoption of EVs will follow that particular model. One of the troubling issues is that as EVs become more common, demand for gas will drop, and prices may drop in response. EVs will drive the cost of transportation down for all cars, and that may significantly slow the adoption of EVs as time goes on.
But there are other indicators that change is coming, and may hit soon. BMW has the i8, Porsche has the 918 spyder, both plug in hybrids, Mercedes has the AMG SLS electric drive. Chevy has the volt and now the spark, Nissan has the leaf. Toyota is building the plug in prius.
The advantages of a hybrid over a pure ICE car are clear, you get regenerative breaking, drastically improving mileage for moderate investment. The advantages of a plug in hybrid over non-plug ins is also obvious, a couple gas free miles at the beginning of every trip. The disadvantage of hybrids is that they are expensive, you have to put two power trains in them. The advantage of a pure EV is that you can increase your all electric range, and do it without being extremely expensive. But plug ins are a very important development, because if you fear having limited range, you can buy one, and realize that you rarely turn on the engine, even with a measly 50 mile range. If you were to get something with 150 mile range, you would be set.
I suspect that a majority of new cars being plug in hybrids will come fairly quickly. At that point, the percentage of miles driven with gas will plummet, and EVs will continue to improve and become more common until they ultimately replace plug in hybrids.