The same cars we have today just more technological. More hybrids, motorcycles, cars that get 50-200 mpg.
The general improvement for 2012 cars is better gas mileage. All 2012 cars seem to have that feature.
Counting Cars - 2012 was released on: USA: 13 August 2012
Extremely Used Cars There Is No Hope - 2012 was released on: USA: 2012
If you're talking 2012 cars, they are already out. 2013 cars won't come out till August or September 2012.
Comedians in Cars Getting Coffee - 2012 was released on: USA: 19 July 2012
Counting Cars - 2012 is rated/received certificates of: Singapore:PG (season 1)
Counting Cars - 2012 Maxed Out 1-10 was released on: USA: 18 September 2012
Counting Cars - 2012 Buggin' Out 1-1 was released on: USA: 14 August 2012
Little Women Big Cars 2 - 2012 was released on: USA: 15 May 2012
Counting Cars - 2012 Framed 1-12 was released on: USA: 25 September 2012
Counting Cars - 2012 Ultimate Challange - 1.11 was released on: USA: 18 September 2012
An increase of 2 cars per year.