Omnipresence is trait possessed by none, but looked for by everyone. It is a pipe dream to be in complete control of everything, let alone be in all places at once, but it would make our jobs a whole lot easier if it were possible.
When it comes to live sound, being in at least two places at once would be nice, three would be ecstasy. Juggling time spent behind the mixing console and getting that perfect sound is not a task that can be accomplished in the five minutes before the production starts; it requires a lot of back and forth between performers and the sound person or persons to get everything sounding pristine.
In an ideal world, people would communicate better, sound checks would be quicker and the mind behind the mixing console would be able to adjust the mix from any location in the environment to make sure the levels sounded great — no matter where