I am sure some people said the same thing about cell phones and television too so you're probably in good company.
I personally think they will be here in short order in but the timeline will depend largely on the batteries and automation of flight much like electric car adoption. Apparently the Lilium Jet project will only require a 25-hour flight course because it will qualify as a Light Sport Aircraft... And because the cost of electricity even at an airplane sized battery scale is of so little consequence I can see small light air taxis taking a big chunk of at least the regional flight market since even by conservative estimates 90% of airports in the USA and Canada have little to no traffic through them, which is a lot of unused capacity!