Baffles me too. We are complaining that we are near a limit re supplying electricity, because the government were too incompetent to build more nuclear power stations, and green options still aren't a good substitute (and IMO are likely to be supplementary sources anyway). We have cut down on coal and oil. Yet someone is hoping that will all be sorted enough by 2040 to be running down petrol and diesel transport ? And at the same time some fool is trying to say that we will all be generating our own power in our own homes; talk about cloud cuckoo land.
The only option is to have a difference source of power. Maybe someone has found a way to create vast quantities of hydrogen, or power cars on water, or maybe the nuclear car is just around the corner ?
I have to think that this is wishful thinking. The hope being that it 23 years either something turns up saving the government's face, or everyone forgot the strategy that failed so someone can gain publicity here & now, being seen to be doing something (daft), and not have to take the ridicule when the time comes.