This squares with my experience. The folks I know that travel by small plane do so because they enjoy flying, not because it offers any real benefits over driving.
These folks are also not lacking for disposable income.
One quick look at the "estimated" price tags for the flying cars in the article - $280,000 & $400,000 as examples - should be enough to reveal how stupid the idea is at the core.
For $400,000 I could get a decent shape used Beechcraft Bonanza and a 2 year old Corvette or BMW M-class sedan. Both of which would out-perform the Flying Car in either respect. Easily.
These folks are also not lacking for disposable income.