Laz Ruda takes the GH4 for a spin in the NA-GH3 housing. The GH4 camera fits in the GH3 and is functional. The mode dial on the GH4 is different from the GH3 and does not quite work properly in this housing; we'll have more news about this and a new GH4 specific housing soon. In the meantime, check out this quick video from Laz:
Stay tuned for more video from this cool new camera.