So let me get this straight - You're quoting an article from 2014 in 2017 while debating a rapidly improving technology?
4k and HDR is infinitely better than the 1080 non HDR counterparts. Yes some implementations are better or worse then others, but in general streaming 4k will provide the most ideal picture in 2017.
Apple had an excuse in 2015 for not releasing a 4k Apple tv, however this is 2017 and that excuse is no longer valid.
Edit - Changed 2k to 1080P
The facts and observations in that article are still true today.
Rapidly improving technology?
Most Americans still don't have the bandwidth required to stream 4K video without terrible compression levels. With the Trump takeover of the FCC, expect cable bills to skyrocket while internet speeds stagnate or become slower.
There has been no revolutionary development in compression technology in the last three years.
Most Americans don't own 80" 4K TVs. Most 4K TVs in this country are 55" or smaller and are viewed from ten feet away or more. Humans have not evolved to have superior vision that can discern 4K resolution on a 40" TV from ten feet away.
Of the limited 4K content that is currently available (excluding home video and GoPro movie clips), most was not shot natively in 4K and certainly not in HDR and most 4K TV sets in the installed base do not support HDR.
Most 4K TVs in the wild don't have the processing power to decompress h.265 video with full quality.
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Even though they are going to be very late to the game they need to include the following.
1. 4K HDR support.
2. I GIG Ethernet
3. Audio passthrough to enable ATMOS and DTS x MA to be decoded by AVR
4. DV support.
1. Most 4K content is not HDR. Most 4K TVs currently in homes don't support HDR.
2. Wifi is more than fast enough to locally stream full quality 4K content. There is no need for gigabit ethernet in the Apple TV.
3. No idea what this is about, and I suspect 90%+ of ATV owners don't either.
4. Lol! What is this, 1999?
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The chart! It always must make an appearance in 4K

TV discussions.
If you will use the wayback machine and hop back to before Apple launched

TV3, you'll see the exact same chart with only some resolution changes being used to passionately argue against the need for a 1080p

TV.
I doubt it. Either you're referring to an entirely different chart from a less qualified source or you are mis-remembering the argument at the time. The chart I posted is based on facts corroborated by none of than Sony and THX, not to mention independent experts in the field.
And guess what? if you bought a 40" 1080p TV to be viewed from ten feet away, you
aren't going to see the resolution there either.
This is science, buddy, not "alternate facts."