It’s true that sheet music can for hymns can be downloaded from sites such as Hymmtime.com and then printed in the bulletin. but I still make use of the hymn books—not only for the music, but for bibliographical information, scriptural references, etc.
In my opinion, the old hymn book will suffice for the old hymns, and multi-media will do all one asks for the newer songs.
So, imho, hymnbooks are a has-been.
More importantly, they are a way for a pastor in one of these brain-dead denomination to tell the hymn-committees to go suck on rotten eggs.