On my iPad, I use the OnSong app to organize lyrics and song notes. It can send MIDI also, so I have it send MIDI via a Bluetooth dongle to my FM3 (and also out to my Kronos Keyboard). I have another Bluetooth page turn pedal that scrolls through the song and then goes on to the next song. Before a gig, I organize the 45 songs or so from our 200 song repertoire into one set. This allows me to effectively be able to scroll through the whole set without touching the iPad OR the FM3 for preset changes.
But here's the brilliant part: Along with preset changes (PCs in MIDI handle these; technically 'program change'), I can also send control changes (CCs in MIDI). In my preset with the Pitch Block set to Virtual Capo, I have MIDI control set to the pitch "shift" control. This means that when I scroll to the song "When I Come Around" by Green Day, it automatically changes to the preset with the Virtual Capo and downtunes my guitar by 1/2 step. Then, I'll go to "My Own Worst Enemy" by Lit and it changes to my general use preset without any pitch block. Then I go to Fall Out Boy's "Sugar We're Going Down" which is quite difficult to sing in the recorded key, so it changes automatically to preset with the Virtual Capo but this time tells the pitch to drop by 1 whole step.
It took some big brain and some time to get it all set up, but it's SO worth it. You can keep the show going without having to change guitars, spend time tuning, or even needing to remember that it's down tuned. My other guitarist, unfortunately, doesn't have Fractal gear and we occasionally start songs and he's either still downtuned or forgotten to downtune, whereas that's all automatic in my setup. Now, I use a Variax and for a couple drop D songs, I'll occasionally forget to switch it back to regular tuning lol. All part of the fun. A lot of bands, including ones I've been in over the years, will simply just play EVERYTHING with their guitars tuned to Eb. But that makes it difficult to practice the songs along to the recording and especially difficult to work on harmonies unless you bust out some recording software and manually re-record the songs a half-step down. The corollary to this, of course, is that songs that are already a half-step down sound authentic without any adjustment. But the songs recorded in normal tuning far outnumber the songs recorded a half-step down or some in-between tuning (a few of those nasty fellers out there).
TLDR - the Virtual Capo (or any device that does what it does) is an awesome way to play cover songs authentically (or to alter songs to make them singable for guys with less range than the recording artist) without needing to stop the show constantly to retune