I believe YouTube allows 4K livestream feeds. It would be great to be able to stream 4K through Cinamaker (even if it was a feature only available on later model iPads due to increased processing power needs and / or using ethernet cable connection).
Yes, we are eager to deploy. It is on our roadmap, but because of the extremely high bandwidth requirements in between the devices we are waiting for better network technologies to become more widely available. It should not be too long far away although we don't have any set date.