My setup is based on a few principles:
1. Keep it simple;
2. Hide the electronics as much as possible; and
3. Help me stay on track.
I currently use BIAB for Windows on a Microsoft Surface Pro tablet, fed into a PA system.
I don’t have to convert or export files (simple). It sits on my music stand next to my iPad Pro, which contains my Word.doc scores (hidden). BIAB's moving highlighter reminds me where I am when my mind wanders (on track).
If I need to do a lot of arranging, I use my desktop BIAB version and transfer the result with a memory stick, but most adjustments can be made on the tablet, particularly with the attachable keypad.

Cheers! -Alastair