In science, a new antibiotic! Something that could stop the rising tide of resistance to antibiotics in bacteria! Many infectious diseases have been resigned to the past but are now coming back because the drugs we have for them have stopped working! Development of new antibiotics for anyone would be an enormous and useful achievement!
As for everything else, a lot of our technology is really as good as it’s going to get! Smart phones can’t be improved much now, they try with snazzy features but it doesn’t really add to the user experience! A better method of travel, than driving I think is drastically needed, driving is so dangerous and so bad for the environment that if a serious alternative to this could be invented that would be brilliant!