This came in from a highly reliable source:
FW Update is coming for GH5 & GH5s. Seems to incorporate C-AF fixes for video mode as well as some additional enhancements for video. Also some updates for foto features. But still unclear if GH5 will get higher frame rates and high res mode.
GH5s at [shopcountry 72740].
GH5 at [shopcountry 68000].