“But trust me, everyone will ALWAYS need to sign their names to things”
Electronic documentation, electronic signatures are already here.
Vintage Singer sewing machines also go up in value but that doesn’t mean people use them.
Somehow, I doubt very much that everything you and others imagine about the future will come true; it never has before3, when people predict what will be "normal" in 20, 50, or 100 years.
Unlike vintage sewing machines, there is a huge pool of collectors for quality pens, watches, first edition books, paintings, and object d'art, many of which are signed by.
You only read at the library,on a machine?
With a book, you can read ANYWHERE and you don't have to worry that someone will change any words/whole chapters, or even, as was done with quite a few books, in the past, pull the book, even though people have bought it.
And pssssssssssssssst...we have "keyless" cars, but the STILL have sort of a key. ;^)