Electric aircraft will be use where there is business case and where the alternative is much, much longer. Think Norway west coast . 20 min flight versus 3 hours by car. or Maldives islands hopping, of flying to/from into city centres e.g. ( Rio- Sao Paulo, etc..) that sort of tings.
It is no surprise that Wideroe is interested and will pioneer the technology very soon..
One major issue has still to be overcome , changing the batteries. , EASA currently prohibits replacing /introducing fully charged batteries into an aircraft on the few types they certified so far . .I am sure a tecnological solution will be found , but currently you need to recharge the batteries after a flight . making turn arounds uneconomic.
.