We'll see, I think people will go for this simply because of the forward facing tilty touch screen, DPAF w/face-tracking, and 4K at 30fps. It's a vloggers dream and looks like it'll be a really decent stills camera too......as for lenses? who cares? Most already have lenses that'll work on it. Looks like you can even snap on a 10-18mm EF-S lens if necessary.lol. They will not catch Sony A7 II sales in 2018. Not with this one. Unless they offer it for USD 999,-
And 2019 will be tough on this thingie, because Nikon Z6 is better and Z7 even more so.
And Canon RF lenses neither smaller/lighter nor less expensive than Sony or Nikon.
This camera will fly off the shelves IMO (especially if it comes in around 2000.00)