This seems like two photographic tools in one body, which is perhaps not a convergence. But looking at the other end of the image creative process where the work is shown, there is also a new display medium that needs something to show.
We used to have movies on screen or TV, and printed still images framed on the wall. Two separate things. Now, we have framed flat panels. A bit small, but getting larger, thinner, and colour gamut will come last. They're nice for desktop slideshows. Once they're up to 11x17 and about the thickness of frames, you have a display that becomes suitable for showcasing collections of still images, and time series images (trying to avoid "movies" or "video clips").
There will unfortunately be cute sunrise sequences and infinite loop waterfalls, but this also allows higher end work, anywhere from a minute to an hour long. Either for the attractiveness of images being shown, or exploring an idea. Owners of the display frames may choose to have the entire work run through, but they'll also be able halt it any of the image points. Because those points are attractive, or the series explored an idea and that's an image worth thinking about further, or to them the key image.
To support that type of composition, and especially a frozen moment in the series, all frames would need to be as good as a single DSLR image. So now with one camera, one can work in both still and time series styles of work. It seems to be a convergence of tools, but the type of work is not converging, it's supporting a new kind of image composition.