Here's the view from the keyboard rig at my church for this Christmas season. I can't take credit for building this, but I'm blessed to be one of the guys playing it.
There are seven different MIDI controller devices: 2 NanoKontrol mixers, 1 NanoKey, 1 NanoPad, 2 XKeys, 1 Nord Stage. All arranged in a custom-built rack, and managed by a highly customized MainStage setup on the MacBook. The iPad Pro is displaying chord charts, with a PageFlip pedal to turn pages.
All of the iconic sounds of Christmas are right at my fingertips, including tubular chimes, sleigh bells, glockenspiel, music box, and lots of sparkly/glittery pads and textures to mix and match. So much fun to play!