Very nice display. But I just can't see myself using it like that. I want a clear view of the audience, and I want them to be able to see me.
I'm finding the screen on the S970 quite adequate for displaying text files. If I have a need for a PDF (very rarely) I use my small laptop/tablet hybrid.
I could see perhaps putting it on a slanted support of some kind, so it didn't stick up so much. Back when I hauled around crates of fake books, I did that, but the angle has to be just right.
I may experiment with displaying text output from the keyboard to an exterior monitor so the keyboard screen could be used for other things, but I also don't want more gear to deal with. Ongoing battle. . . keeps us young, right?