For years now there has been a great deal of discussion within the intelligence community as to what constitutes war in and unto itself.
The article is only suggesting that Swedes be prepared when others would say we are already at war. Not a shooting or "hot war" but a new phase espionage or "cold war" This "cold war" if you will has a new favorite weapon - InfoSec.
The US Government has a similar program you may recall: https://www.ready.gov/make-a-plan
Just another turn in the wheel.