My eldest son has a theory that everything we really need was invented by the 1970s*, and thinking about it, I believe he has a point. Computers and mobiles (for example) are great, but do we actually need them? We never used to be in touch with everyone all the time. And time was when we were happy to write letters, use typewriters, look things up in reference books etc. We only think we need all these things because we've got them; we were fine before they came along.
For myself, I think all the best inventions happened before 1970; the car, the washing machine, the vacuum cleaner among them (the washing machine would get my vote as the best. After all, horses are more fun than cars, and the old carpet sweepers did the job adequately. Hand washing, on the other hand, is the pits). What do you think?
*The son himself was invented in 1972. I know. I was there.