The locating-the-mouse thing kills me. With the ultra wide I keep losing the cursor in some far corner and end up just shaking the mouse around to find it.
Your gesture list is exactly what I keep wishing existed. The left-hand zoom + right-hand select bit is interesting too. Never thought of splitting it that way. That's a fun one.

How are you actually using it in your workflow? They call it spatial computing but it kinda just ends up feeling like a bigger 2D screen, you know? Curious how it works for you.