I suspect the bulk of the murder victims were not from modern high-tech places, and wouldn't have been inventing any big-ticket items. Since Germans had been suffering the pre-war slow boil early victimhood, a lot of them, such as Lisa Meitner and Einstein got out.
The war in general, not just the mass murder, caused severe disruption and wildly shifting priorities. Television was a very popular 1930's new tech, featured in fiction. It was probably set back years. Yes, late war missiles were TV guided, but that was small secret programs. I suspect computers were slowed down some. Kuno Zuse was having fun making them with his family, but got very little business. I think the Luftwaffe bought one. When moderns comiserated with him about lack of success, he said considering who was running things then, it's just as well.
Now, for those of you actually taking the risky time travel trip to save folks, don't go expecting Mr Hitler to be all that important. Yes he talked up anti-semitism, but that was an old 1870 Austian political trick, stirring up the rubes with fake threats, leading to crystal nacht modest numbers of murders, and actually theft was a bigger goal of it. The Wannsee conference notes make a good case that the purpose of the mass murder was a weasely scheme by the SS to pump up their own importance.
I don't want to be a total downer. I feel strongly that if the war had been mostly prevented the whole 20th ct. would have been hugely more productive. We were staring down the commies for half of it, with staggeringly unimaginably expensive unusable death machines. A tiny war followed by a true peace would have left us with resources to fly to the moon and beyond on a lark.
Nils K. Hammer