Replying to Why are DSLR's so slow to evolve with respect to video?

I'm curious why Canon can get away with selling what is practically the same camera in every rendition of the rebel t*i series while still charging nearly the same price they were 5 years ago. It seems like consumer level DSLR's are starting to fall pretty far behind other cameras when it comes to resolution and frame rate. Even if they are primarily made for photography, what is stopping them from developing the video capabilities a little further?

We are at we the point where people are able to shoot 4k video with their cel phones and helmet cams but not on more expensive digital cameras.

There are sub-1000 dollar camcorders (HC-VX870) that can shoot in 4k and 1080p at 240fps while the t*i cameras can't even record good1080p at 30fps. This also makes me wonder why people are so quick to recommend t*i's on Newschoolers to people looking to film skiing. Are interchangeable lenses and a larger sensor worth shooting with a camera so outdated in nearly every other aspect?

/rant