I wonder just how advanced Germany would be nowadays without the World Wars.
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.
Take a look at the very first Nazi book burning, for example, which targeted Magnus Hirschfeld's Institut für Sexualwissenschaft. It was the leading institution of its kind, and the complete destruction of its archive and community not only set back the LGBT community in Germany (and to a large extent the rest of the Western world) some 30 years - it didn't really recover until at least 1970!
If it can cause that much damage there, imagine what it would've done to the wider scientific community.