I don't think that's true. Germany was ahead with its technology but lost in the end. Also, based on what's happening in Ukraine, I don't see WW3 (if it happens) being fought in cyberspace, but very much on the meatspace called earth.
Discussion
The Americans figured out the assembly line and mass production. German tech was top shelf but it was slow to build. The factories figured that out, not the generals.
WW3 might be fought everywhere (meat space, cyber space, and in the mind)... might already be happening. Whoever has the best tech (and the most open mind) wins.