"With sales of 4K TVs set to balloon in 2015 and more native 4K content sources appearing week by week, the continuing inability of the PS4 and Xbox One consoles to deliver any sort of 4K action is starting to look more and more uncomfortable."

What is the current base of 4K televisions? How many 4K television were sold in 2014?

I ask, because outside of stores selling them I have never seen a 4K television.

I hope so, HEVC is delivering the same 1080p quality at half the bandwidth.. so hopefully 4K will the become viable to stream at home.. pretty sure the slim versions will support this, would be insane if it doesn't happen.
Even having 1080p video at half the bandwidth would be worth it for people with capped internet

You actually kind of have. Ever take a photo with a 13 MP camera? The photos are 4K res.

Yeah well I do admit the benefits start to diminish at a certain distance, but not everyone will see the image the same way.A group of people could have the same level of vision, but not everyone is going to have the same perception.Some of the people in that group might be able to notice the difference by focusing their view into specific details that see a greater benefit from the higher resolution.While the ppl that didn't see the difference from the higher resolution focused their view into something else that didn't see much benefit,thus were unable to see it.

Bolded: I doubt anyone with a 4k capable gaming PC would have a crappy tv, I for instance upgrade at least 1 of my tvs to the newer model every year.

About the last part yeah, i don't think higher resolution affects color, maybe the extra clarity "enhanced" the game's textures and made them look more vibrant, I don't know. 

Highly doubt it, even more so that it's only intend would be video streaming as of now.

http://wolfcrow.com/blog/notes-by-dr-optoglass-the-resolution-of-the-human-eye/

Assuming the average viewing distance for television is 6 feet (1830 mm), p@0.4 is about 120 ppi and p@1 is about 50 ppi.

Most consumer large screen LCD and LED panels are about 50 ppi to 90 ppi, and average about 72 ppi. Now you know why. If your television gets smaller in size, then the higher ppi doesn’t really help. This is why 1920×1080 (at 100 ppi at 6 feet for a 50″ LCD/LED television panel) is good enough. The eye can’t really resolve a lot more at 6 feet.

http://www.digitaltrends.com/home-theater/720p-vs-1080p-can-you-tell-the-difference-between-hdtv-resolutions/

So I think it is simple that at >55" < 6 feet away you'll notice a difference. Considering how most HDTV's that boast 4k are greater than or equal to 55 inches, your comments are kind of irrelevant. People who buy 4k already have televisions big enough to notice a difference. 

They support 4k video already...

4K would be too expensive in my opinion. And 4K monitors already cost so much money. Is the penetration rate really that high for 4K TVs?

Well don't the Xbox One and PS4 come with 4k HDMI cables? wouldn't surprise me if 4k streaming of videos and pics happens, no way it happens for video games on these consoles, they can't even do 1080p consistently.

May I ask you if YOU haver personally seen 4k in person? I casually go into my local Curry's store where they have 4k TV's showing and it's absolutely jaw dropping. So you're either spreading information you haven't concluded for yourself or need to get your eyes checked.