It was the single largest armed conflict in the history of man and the status quo at the end set in place the bipolar world structure for the next 50 years and which we are still living in the fallout from.
Why would it not be important or discussion worthy?
Technology took huge leaps as a result of military efforts to improve equipment, faster ships, aircraft, vehicles. Germany entered the war with planes like the Fieseler Storch,
and 6 years later they had the Messerschmitt ME 262, the world's first jet fighter
http://en.wikipedia.org/wiki/Messerschmitt_Me_262.
There were improvements everywhere, weapons, armour, drive trains, communications, photography, medicine, food packaging, radar, international cooperation, postal service.