Battery prices can be offset by cheaper electricity and/or carbon taxes.
Less noisy planes should also be able to operate in areas jets aren't, such as extremely desirable urban centers. eVTOL is even better in that, but developments that would make it rival fixed wing are coming, eventually. If a V-22 can do it, so can civilians.
ATC is the choking point - we'll have to take a lesson from the phone system, which transitioned from having human operators routing calls to all of us recognizing dial-busy-ring tones and being able to dial numbers ourselves.
As it stands, in non-controlled airspace, it already works like this. Pilots announce their intentions and coordinate with each other. This only works in areas with very low traffic.
There are some very interesting research topics in there in how to achieve this distributed consensus and how to deal with malicious actors trying to disrupt the air traffic in the region.
General aviation 100LL ("avgas") fuel is taxed federally at $0.191/gallon (or $0.335/gallon for certain ownership structures).
General aviation jet fuel is taxed at $0.219 (to as much as $0.244) per gallon.
Highway fuel is taxed federally at $0.184/gallon (slightly less than avgas).
Electric aircraft are not poised to disrupt the jet-fuel burning sector of aviation. The aircraft in this article will be competing against aircraft using taxed fuel (100LL).
(Note that some states do tax airline jet fuel and some airports assess a flowage fee per gallon [which is for practical purposes equivalent to a sales tax].)
I don't know if that also applies to purely domestic use though. Maybe that's how states can impose a tax?
However, I suspect then you'll run into other issues. I can't imagine LA can have too many air taxis flying around before they become a nightmare to manage. If the hourly cost of an air taxi is low enough that everyone can take one, the sky will become saturated. There's obviously a lot of space, but our systems for managing air traffic right now are designed around there being tens to hundreds of aircraft in the same area, not thousands. We'd need to introduce fully automated aircraft routing to have a hope of dealing with air taxis over dense cities if they became remotely popular.