Earlier quoted context omitted.
If you mean like jetpacks and robots, it would probably look the same as our current timeline, given that "nowadays" is 70 years later plus the global diffusion of technological progress. Perhaps the real question is how much incrementally-better everywhere would be without old wars.
I think the trick is to either get governments to fund basic research for a reason other than national defense, or get them to fund it for that reason but then never use the weapons.
That's basically what happened during the Cold War. Aerospace technology and others were advanced incredibly (e.g., the Apollo moon missions).
These days, we don't get this so much, so we have to rely on advertising companies to give us innovation...