Remember, there is close to 1k price difference. If you are new to the system the mkII offers more than enough. Personally, I'm waiting for the big one.
I would wait until people start using the streaming feature before throwing any parades. Been disappointed by other Panasonic cameras that had some sort of streaming capability advertised only to find how limited it really was in real world use. If you can integrate it into a live switch situation with OBS and an ATEM etc... then it will be a great tool. If it is just to pop onto Facebook with a periscope - is anybody going to pay you for doing this?