Although... If cars switch largely to electric power, aviation fuel may become cheaper. The fixed costs of batteries then become much more significant, so whilst electric aircraft will gain ground quickly in schools, it will take a longer for them to take over for the sort of aircraft that only get flown a few times a month.
On the other hand, electric aircraft could slash training costs. If it cost 2000 to get a PPL, there would be a lot more people learning to fly.