Sony and Panasonic will have a product launch event on April 7

Both companies have scheduled a press conference at the Nabshow on the same day:

Panasonic at 1pm Las Vegas time
Sony at 2pm Las Vegas time

What to expect? I know everyone is waiting for the Sony A7sIII but it looks like this camera migth be reayd for very late 2019 only. And from Panasonic we might get some early info about the video oriented S camera?