Interesting to note that Leica removed video functionality for the M10 (present in the M9) - apparently at the request of customers
To finaly implement 4K in the SL the next day with all their cine lenses and even M series adapters...
Let's say the first Leica with real video capabilities.
So it tells me 2 things about Leica customers.
The wealthy orthodox right wing buys M series and the poch dandy wealthy communist buys SL.
More seriously, if Leica took video seriously enough, it's now a life style.
Now there are still-only cameras such as Sigma and Pentax k1. Yes there is video on the K1 but it's so marginal and poorly implemented that anybody remotely interested in video would look elsewhere. So they target the still-only user.
But let's just take a simple case in LULA. Fair to say that M Reichmann was on the very first to smell that video was going to rule the imagery industry. More exactly multimedia. He did review the Canon and that was an eye opening for many people, indy filmakers on a budget, students etc...
When I see a review or an article here, it is so much better in video than having to read text lines with a zoom and scroll on my phone.
Included the forum should give (and it hopefuly will) the capability to upload short video answers for multimedia interactions. Much faster, much lively and human than having to type a keyboard. IMO.
As to answer to the thread question, 2 separate devices each specialized for still/video tasks, the marketplace gives good amount of choices already. Blackmagic, Red, Atik, Kinefinity etc...
But it seems that all-in-one is the route in both production and post. See Resolve that started as a color app and became a all-in-one app. Of course, it's not maybe the best editor because in the end all-in-one is a compromise but it edits and gets the job done. Autodesk Smoke, Lightworks bundled with Fusion...the tendency goes there inevitably.
I agree with Coot. It's not that the industry cannot produce a single gear completly functional for both worlds. They have the tech and designs. They don't really do it for marketing position.