Will the GH3 use a Sony sensor?

I think Oly would have done just as well with a Panny sensor, using their JPEG engine. The Sony move is to remove independence on Panny. It helps Sony too because Sony is going through a bad patch economically because of the balls-up with their TV sets. It's probably a hedge just incase the NEX sales go bad.

I don't think Panny would put pride before profit, it still has a strong hand in the m43 lens arena.