To enjoy 4k, you need a monitor that supports it, that is large enough relative to the viewing distance, enough bandwidth and processing power. You also need a 4k source. Few people produce 4k video : it is more expensive, more difficult and the result is only marginally better.
I think you'll find these boxes are checked more and more.
On the consuming side, 4K monitors are coming down in price very quickly and are at the point where it's reasonable for the layperson to get one. 4K makes a notable difference on a 24" monitor at the common 2-3' distance -- anyone who says otherwise has bad eyesight or hasn't used one yet. Bandwidth-wise 4K uses about 20-30mbit, which is a lot of users these days. With H.265 they should be able to drop that number considerably for most videos.
On the production side, 4K video is already becoming increasingly more common on YouTube as the latest inexpensive professional and amateur cameras -- even phones and gopros -- all support 4K. Editing really isn't much different versus 1080p -- it's not like they're using rendering farms to create special effects.