The big use of a printer in my household is sheet music. Though some musicians have started using big tablets (with a pedal for turning pages), I expect widespread adoption to be slow and painful.

Musicians are not always particularly tech savvy, and even when they are, they may have little patience for futzing with technology. They expect things to just work, and to not detract from playing and working on the music.

Very well organized musicians and larger ensembles with a dedicated librarian have switched to the tablets, but when you're a bandleader trying to herd 19 cats who were all hired at the last minute, you don't want to add an hour to the time for performing or rehearsing to get them all up and running with disparate platforms, file formats, power cables, and so forth. You hand out folders full of "charts" and off you go.