aldolega

Yep, fast-moving shots with a fisheye or ultrawide, mostly. Usually following/next to the skater, or getting right next to an obstacle and doing a fast pan/tilt motion, following the skater as they perform the trick.

Ease of editing/processing is not the "only advantage" of All-I: its motion also looks more natural (and yes, "filmic"). Yes, long-GOP's image quality looks better (at these two compared bitrates) with static or near-static subjects, but not everyone shoots such subjects, or is able or willing to limit their camera moves to a snail's pace.

Personally, shooting an action sport (rollerblading), I am concerned with not just motion rendition, but also rolling shutter, so I expect I'll be using about 20% 4K, 40% 1080p IPB, and 40% 1080p All-I.

Isn't the A7s not coming out until the fall? The GH4 is out now.

I too am awaiting the GH3 user's guide! New camera announcements and theories are great and all, I follow them as much as anyone else, but I want help with using a camera that's available right now. Please finish up that GH3 guide!