Great description of Qi gong Scott!
I'd further like to add that qigong is a practice that teaches the practitioner to bring awareness to their breathing and learn how to naturally breathe. In doing so, it improves respitory functionality and acts as a cardio workout. There are many types of qigong, like the fish in the sea, all different and serving a different purpose to the great ocean of qi.
Learning qi gong practices are like a carpenter learning how to use different tools for their trade. Throughout ones life, different tools can be applied for different purposes to yield a desired result. Much like a carpenter can create a ladder with a saw, lengthy pieces of wood, a hammer and nails.
Having these tools in your toolbox and understanding their use, being familiar, comfortable and confident using them will help as one moves through life, even if their movement is an action of stillness in motion.