I'll try to keep this as brief as possible, as I know this is the Great Preamp thread, but @SteveC brought up the question originally, so it makes sense to continue a quick post about it. If anyone's interested further, feel free to DM me directly and I'm happy to answer questions, or if there's even enough interest, I could maybe start a thread on how it's all set up.
That sounds so cool. I've dreamt of being in a band that is that organized. What is the source of all the midi triggers? Are the triggers programmed from start to finish or does someone in the band push the buttons? Tell me more!
It's entirely automated.

The MD has a laptop that runs
Show Buddy, which functions essentially like iTunes in action. Each song has a file that lets you load backing tracks, program lighting cues, and add MIDI commands at any given point in the song. You can arrange show files in a playlist, and then the only thing you have to do to get through the show is hit the go button for each file. The MD has it wired to a foot pedal under his keyboards.
EDIT: The MD also has commands programmed to control the Future Impact as well, which we use quite a bit for songs as well. Lots of synth bass in 80's stuff.
There are pros and cons to running a click of course, but it does allow for all that cool automation that couldn't really be done otherwise. We're a 5-piece band, so it lets us fill out the sound a little bit too. We have things like the party crowd noise for Love Shack, song cues, and bits and pieces for songs that would require other/more equipment all programmed into the backing tracks. (i.e. we're not Milli Vanilli. No programmed vocals! lol). Lighting is programmed with cool stuff like bringing up spots to highlight specific people at certain times, stage washes, strobes, etc. as well. It brings the show to a
much higher level, with way more consistency from night to night.
Our synth guy has his stuff set up like that. He swipes to a new song on his iPad and his keys all switch to the new setting. It may be thru Mainstage on his MacBook Pro. We don't have it set up for the whole band though.
I have a couple redundancies programmed into my setup to let me control my board that way as well.
1) ForScore for charts lets me program MIDI commands, so just your synth guy, I can change my entire board up just by pulling up a chart. Add in a bluetooth page turner, and again... don't even need to mess with the board.
2) I've also got MIDIPad, which basically functions as a touch controller for my board. I don't use this app much anymore though, since the addition of the MC6.
3) The Morningstar is where it's at. I've got it set up so that I can do the patch changes for the 80's band on my own if needed, including momentary changes in the middle of songs. You can program up to 16 commands per footswitch with a variety of presses (short press, long press, double press, momentary, etc). And I've got my expression pedal routed through the MC6 so I can use it with the Stomp, C4 or FI (or multiple at once).
5sg.