My friend has a special relation to the musical score. He scrutinizes it and finds answers, meaning, understanding. His interpretation and his teaching benefit from this curiosity, this study.
When reading the paper edition got too difficult, he had this system installed.
All the music he wants to work on has been downloaded from music-scores.com and is kept locally on the dedicated computer as PDF. The large tv screen hooked up to this computer provides a well-contrasted image that he can enlarge at will with the wireless mouse.
As a bonus, all the internet is available to find an inspiring performance on Youtube or some biographical notes on the composer of the work in progress.