If a car manufacturer were listening, what would you want to suggest as a neat feature to have on future hybrid vehicles? What are the necessities? They could be anything from a computerized calculation to a full-blown option, and can even be things already available on some automobiles.
I'd suggest:
1) Computerized memory of all tanks, lifetime, and semi-lifetime (transfer ownership, etc)
2) Mileage calcuations for Trip A, Trip B, etc.
3) Household power outlet (we know it can be done! Where else will I put my blender?
)