If you look at the Oxford dictionary definition of war
war: definition of war in Oxford dictionary (American English) (US)
it is clear that a 'war' is happening now.
How it is waged is changing and doesn't neccessarily require a declaration or a vote.
Guided missiles, drones, cyber attacks are all strategies of war - just the use of manpower and weapons are different from what was previously accepted as war.
The era of staged battlefields ended in WWII but there have been numerous wars since.
List of wars 1945?89 - Wikipedia, the free encyclopedia
There has been a tendency to describe them as conflicts, confrontations, insurgencies, uprisings, but they still meet the dictionary definition of war.