The Panasonic S1H had two weak spots when it was announced:
1) It has that big fan you see on the image on top
2) It was rumored to have no IBIS
Well, at last point 2 got debunked! As reported by L-rumors the Panasonic S1H will have IBIS!
Now we have to see if that fan will not make too much noise when recording video :(