I don't do video and I would buy such a camera if it fits my photo needs, but from a marketing perspective, video features help to fill the spec sheet and get media coverage, which may turn into sales, even by people who will rarely or never use the video features - often because they soon understand that shooting good videos requires more than a video-capable camera.
As almost every device with an imaging sensor can do video, I see little reason for a camera company to release devices without video, but maybe high-end "medium" format or very high mpx cameras which are well known to be used in a specific way.