Lotus 1-2-3 got people to use computers. One could argue that spreadsheets are the single biggest business innovation of the late 20th century. I don't think they're going away that easily.
I know people who type whole letters in Excel. I know an accountant in particular who I showed how to use MS Word for writing letters, but he prefers Excel. He writes full documents in Excel, prints them out and mails them.
Laugh if you want but spreadsheets are not going away in my lifetime.