A source told me this (Thanks!) about the ZV1:
– picture profiles – you can use LUTs
– it was able to live stream over 4 hours without any issue
– you can powered it through usb
– very fast AF – you can change speed in settings
The camera will be announced tomorrow(May 26). In June we will get a second Sony announcement with the A7sII successor, 12-24mm f/2.8 GM lens and another “surprise” camera.