Chapman -
No, not talking about multiple tracks - nearly every NLE today does that.
Not talking about "Live switching" - you need to have cameras connected to the switcher/computer to do that.
I'm talking about taking four tapes from four different cameras, synching them up, then "playing" while watching four monitors and using your mouse pointer to "switch" between cameras, just like "live" switching, only done in post.
You end up with a new, edited sequence. It saves so much time! Sure, you may need to go back and tweak some of the cuts, add a transition or two, etc.