I use Polychordal ideas in some of my playing - tapping one triad with one hand, and another with the other etc.

Also, not an actual polychord, but I like starting to sweep one arpeggio and then I'll slide up to a different (but complimentary) key for the second octave - just sweeping straight through. The sweep is quick enough that it's one fluid motion across both.

Just a couple of related thoughts....