Agree with your views that 10 years down the line it would be neither diesel / petrol nor CNG/ LNG.
Petrol or diesel is a mixture of Hydrocarbons. One molecule of Petrol contains on an average 8 carbon atoms, so if burnt , one molecule of petrol would give 8 molecules of CO2…
Similarly, one molecule of Diesel contains 16 Carbon atoms and so if burnt gives 16 molecules of CO2. That way, CNG may be better than diesel or petrol as one molecule of CNG contains one carbon atom so if burnt gives out 1 molecule of CO2 . Yes , CNG as automobile fuel has done it’s job in last 30 years since it was introduced in 1990.
However the future is Zero Carbon emissions… due to the threatening Global warming , climate change and so it is time to look for Solar , wind and energy from ocean waves… Look at Adani Greens with astronomical p/e… there is no stoppage…
For automobiles, it is only electric vehicle …look at Tesla… in fact our Govt has already declared its intention to incentivise electric buses in cities.
However at best CNG may still be a preferred option as PNG for kitchen…until solar cells become popular for cooking our food .