Oh, I most certainly do not think the Fat Lady has sung on new developments. Far from it. I've been around a looooooong time and have seen incredible changes in technology. My first job as a kid was setting type and cleaning presses :ROTFL: The first TV commercials I ever created were 60 seconds long and were cut on film. Some even 90 seconds long.Your last sentence is unfortunately(?)
Sorry for the long posts, but I do believe that there are changes ahead that are at least as big as the transition from film to digital, probably even more so. Believing that the transition from film to digital photography was it, simply doesn't hold enough water.
Don't mistake disagreement with your scenario as "limiting the possibilities". What possibilities does this bring to the party that do not already exist? Some cheaper method of using one piece of gear for both diciplines? What is profound about that? What is so thrifty about that? I can, and have, rented a Canon video camera and used my L lenses to do test commercials. The difference is a non-issue. The client could've cared less what I used.
BTW, guess where almost ALL TV test commercials are now shown to consumer target groups ... the internet.
Digital still photography was profoundly different as far as commercial applications are concerned. IMO, this isn't.
People may well flock to it, and the garbage will pile up.