Depends on what impact to consider real world. Bunch of people managed to transfer money from their countries abroad using bitcoin. Lots of papers were written

Depends on what impact to consider real world. Bunch of people managed to transfer money from their countries abroad using bitcoin. Lots of papers were written studying blockchains. Some financial and other organizations considered and, I believe, at some point deployed systems modeled on Bitcoin technology. Maybe that's not enough to consider it "real world impact", but I suspect more than one person's life was noticeably affected by using Bitcoins.