We all know that 4k is a different beast due to its resolution for shooting with a moving camera. However today I was test the Gx8 @ 1080p with the built-in stabilization and OIS with the 12-35 and the 7.5mm. I was on level ground and walking slowly - the results were pretty darn good fake steady cam video. I normally run any shaking stuff through Mercalli 4.0 PRO and it does an incredible job. But I think for run and gun work this GX8 combination at 1080P is very usable and at most will take a very quick run in Mercalli to be perfect if needed. If you've got a Gx8 try it, you might like it.