Re: I dont get it.
To an extent but you remove all the pollution from urban areas so the air quality would be significantly improved, also the ambient noise from traffic would be reduced also. There are a lot of gains to be had with electric cars. The downsides are the short range (reduced further when driving in Winter and you don't have an engine to heat the car, so reliant on AC all the time), long refuelling times and maintenance costs particularly for battery replacement.
Still the technology is moving in the right direction and when it starts becoming a viable option for most people we'll see a lot more of them.