Personally I don't really have an issue with the cars fueling as it is now. They're extremely efficient already; the 'show' is what accounts for the vast majority of the consumption of the sport.
Think flying cars and parts back to the UK and Italy after every race, moving the crew, hospitality and pit lane equipment between races.
Going e.g. fully electric would have huge impact to the sport, since cars will no longer change weight during the race. Formula E has tried to tackle these issues with sustainable tyres and no pit stops. I don't personally see how all electric f1 would differentiate itself from FE as it is now.