And that's where just having 'Nibbling on Spongecake' pop up on your arranger's screen suffices. Most modern arrangers have quite adequate lyrics displays. Quite a lot of them play MP3's. Some of them will even display a .bmp graphic file, which means you can convert a .pdf and display that.

As I said, what impresses you most when you go out to listen to someone ELSE play? Someone fully engaged with the audience, or someone reading off a chart?