This is the 10329th most frequent Russian word.
будущими
"Будущими" means "future" (instrumental plural form) in English.
In this sentence, 'будущими' is used as an instrumental plural form of 'будущий', meaning 'future', to describe 'scientists'.
Мы гордимся нашими будущими учеными.
We are proud of our future scientists.
Here, 'будущими' acts as an instrumental form to describe 'technologies', referring to those that will exist in the future.
Он всегда мечтал работать с будущими технологиями.
He always dreamed of working with future technologies.
In this example, 'будущими' serves as an adjective in instrumental plural form to characterize 'generations' in relation to future.