How about making the car lighter, improving efficiency, enabling smaller engines and probably driving pleasure? How about trying to look at natural airflow through the car (like in energy efficient buildings) so we don't need to put on the air-conditioning so often. How about more environmentally friendly materials - see Eco Elise or Fisker Karma?
I'm happy that BMW marketing thinks that premium is defined as environmenal compatibility but I guess the finance mentality will still be to concentrate on expensive complicated 'technology' options that divorce us from the driving, or at least take away the need to concentrate. Give me steering feel over in-car internet any day (actually things like the latter put me off - part of me thinks it's just another thing to go wrong) I really wish one major manufacturer had the balls to offer a light, simple car which was fun to drive, and where quality was defined by engineering integrity rather than superficial things like soft-touch plastics. Heck, I'd even be willing to pay more for this.
If you think about it many of the cars we end up loving are the simple, light cars. Things like Porsche's 3.2 or 968 Clubsports are much more in demand than the luxury models offered at the time.