In the early days of digital wedding photography many shooters where using 8k pixel cameras and it really became clear that digital was taking over when the 20D started getting used for weddings. In fact since most photos are published to the web or to an album then 8k pixels are plenty.
There has been a lot of noise around 4K video. I have even seen some snaps from video that are sharp and clear. Now if the video is running with a high shutter speed and the photographer is careful I am wondering if this would change wedding photography as we know it.
If we consider 4K video just a 30 FPS 8K frame rate maybe the future is taking video and ripping snaps for the album while using the video for other publishing features.
What do you think?

I can see it being handy at times, when the primary prerogative is video, but I couldn't see trying to mull through an entire video to pull stills, and I certainly wouldn't want to watch an entire video shot at 1/125th a second. If you're a videographer that want's to offer a few stills then sure, but getting rid of the photographer completely? No, I don't see it. 
