The smaller Scarlet (2/3") is primarily digital cinema as the sensor is only 3k (around 5mp), but as with all the cameras in the range, the idea is parity of quality across the motion / stills divide. Current DSLRs that have video capabilities do so by vastly reducing the quality potential of their sensor to record the video. You can see this for yourself by shooting a video scene and without moving the camera, take a still. Match a frame from the video up with the still in photoshop and scale the still to fit. You'll notice a vastly superior image from the scaled still.
So, what you'd expect from the DSMC system is that if you did the same still / motion experiment, that 1) you'd not have to scale the still down to the size of the video because the video, being RAW from the sensor like shooting RAW stills, is the very same size, and 2) that the image quality of both stills and motion is practically identical.
Although the small Scarlet looks a bit tricky to hold, I think the shown picture is missing the modular handles that will make it so. There'll be more updates on that aspect as we go on.
Graeme