Imagine the peak/rush hour with hundreds of these things buzzing around all trying to get there first! What a clusterfvk that would be. Throw in some bad weather or the darkness of night and it will get real messy real quickly.
You only have to look at the road toll or the newly qualified private pilot toll to realise that this will never happen on a large scale and very few people that would buy these vehicles would be bothered to get a commercial licence or do any sort of training.
I remember as a kid, 60+ years ago, there was talk then about flying cars to relieve road congestion. Ha! It ain't happened yet.
Cheers,
BH.