Don't want to piss on anyone's parade here, but shooting a burst of raw images is hardly the same as shooting video for even just a few minutes.
The fact that the sensor can do that for 1 second does not mean it can do it for longer periods of time without heating up or even dying forever. And assuming it did last for hours working at that speed, image quality could degrade over time, and everything in the camera would need to be updated to keep up with the data and heat.
I don't think the same camera could shoot that kind of quality video for the same price or even 3x more if Nikon had wanted to, it's very different things, and a lot would need to change with the camera.
No doubt camera companies are not giving us as much as they could/should, but this feels like a bit of a stretch in optimism.
The BMCC sensor can do 60fps and global shutter, and still they didn't go with it, probably due to image quality issues and heating problems in those modes. Personally I'd love it if they gave the users the option to choose the shooting mode (global vs rolling shutter), regardless of image quality, but they didn't give the users much choice at all with this camera. They didn't have to, I guess that was one of the perks of being the only $3k cinema camera in the market.
The 7D shoots up to 20fps 10fps raw images per second with the fastest cards and it has a mechanical shutter, imagine what it could do with an electronic one, if Canon wanted to...