Where ever diesel pollution is an issue, such as LA, Beijing, Santiago, Mexico City, Denver, etc. It is evident that todays electric car is a must.
However you cannot underestimate the power of the diesel lobby. They will run dissuation as best they can.
For starters, where are the tax breaks available to gas guzzlers for fast depreciation on electric cars?
I agree with you that demand should rise. However, do not hold your breath. It may take while.