When I attended an Indian Orthodox parish, I'll admit, I would rather have the screen than a book. Sometimes, things get skipped around in the book that it's hard for the person to follow for the longest time until they finally understand the rubrics of the liturgy. Coptic liturgical books aren't that much different. I mean granted there is a nice organization to them now, but yet still, there are some areas of skipping around that if not understood or experience, will end up making one getting lost.
With the screen, after a couple of months, one will get to understand what's going on. No need to be distracted flipping books and learning where things go. When one learns the essentials of liturgical prayers, then the "extra" in books are to be understood later. I don't see the learning by books vs. learning by projectors any different. Furthermore, while I lament that some churches are designed in ways where the screen covers the iconostases, there are yet others where this isn't much of a problem, and thus less distracting.
Nevertheless, one weighs the pros and cons. Would the icons of the Apostles be shown better, or would following along the liturgy while the icons of the Apostles be blocked better? I choose the latter, especially since it's a bigger luxury for churches to have extra icons, such as those of the Apostles, than it is to provide the congregation with a sense of following along the liturgy without getting lost, and without constant complaints of people saying "I don't understand anything in the liturgy." It would be great if EVERYTHING was in English, but at the moment, we make due with what we have until people are tolerant enough to have English, and the English is accurate enough for its theological depth.
Nothing is ever perfect in any place we go. But we want people's intellect to be in prayer, a very important part of prayer. You can only stare at an image of Christ for so long, and it would be sad when you stare and pray your own prayers, and not the prayers of the community together. In fact, Coptic tradition has it that we even close our eyes in prayer. In the end, whether books or screens, it should make no difference for the one who is proficient in the liturgy.
PS There was a time when a small number led screen was above the iconostases indicating the page number in the book to help the people follow along. This was before the advent of screens.