Keyboardist/DJ's typically use laptops, but most guitarists I work with have no computer in the live rig. Adding a computer to the setup just for this purpose would be prohibitive. In my live setup, there are a few digital pedals (Strymon, etc..), a marshall head that supports midi for channel / mode / boost switching and a (future) pedal looper that supports midi to control signal routing to bring pedals in/out of the chain. "Wireless" access to these devices from an iPad in a live setting is where I'm headed. I'm considering something like the PUC on the pedalboard and an iPad with custom MD-controls as it would definitely open up opportunities for things otherwise out of reach when on stage. Regardless, MD is still useful to me as an in-the-studio deep dive editor for some of my hardware units. However, if it could be incorporated both in the studio and in a live guitar rig, that's certainly a bigger win.