Blogger Tim Challies has written two posts on the subject of using hymnals in church.
“What we lost when we lost our hymnals” describes the downside of using projected words instead of hymnals.
“What we gained when we lost the hymnal” describes the upside of using projected words instead of hymnals.
Neither article will convince you if you hold the opposite opinion. But Tim does a good job of being objective about the challenges inherent in the topic.