So perhaps we can go back to the topic of engine technology. I believe that F1 will not adopt fuels that are far away from the fuels we use at a petrol station and take a pick from those fuels with criteria like suitability for the sport (noise, safety, energy density, greeness). In the past issues like avoiding lead or sulphur and adding bio content have been included in the F1 regulations. In the future it could be fuel with more standardized combustion properties that promote HCCI.
But all the future developments need a total fuel cap to take the right direction. Without that we will se the resources go into the wrong development projects. The sport should be producing performance from a energy budget and not from an open energy bill. I don't really care if the cars are noisy or not and I don't mind if people want as much power as possible to play with. All that can be done within a shrinking energy budget. The most important thing for me is getting development focussed back on engines, KERS, vehicle dynamics and generally propulsion technologies instead of aero, aero and aero.