Since CryEngine supports it Star Citizen also supports it!
I have been unable to find any information about the maximum resolution that CryEngine supports (even in the official documentation), hence why I asked you for a source which you
still have not provided.
Let's take theses "sources" you did provide one at a time shall we:
This article mentions 4k and 8k UHD resolutions (and 16K textures - which are nothing new lots of games have 16k textures, including Rage, Shadows of Mordor, etc. there are even 16k resolution packs for Skyrim, a game that's 4 years old now).
They also do not provide an official source for these claims (for example by CIG or CryTech), and the most telling phrase they use is "the company is working on ultra-high-resolution textures,
which may indicate that the game is designed for future UHD displays."
It then goes on to say that their source talked to Chris Roberts and he said in the interview that "the team is working on 4K and 8K textures". Again, 4K and 8K textures are nothing special in these days, and are completely unrelated to the resolution claims that the original article made.
This article is an opinion piece with no concrete information, nothing more.
This article is again just an opinion piece, and they directly link to the previous article as their source, and again confuse texture size with resolution.
So this article is again nothing but more unverifiable claims, and should be ignored as it's basically just fluff.
This article is completely unrelated to Star Citizen, it's about AMD and Nvidia getting ready to support 8K resolutions. It doesn't even mention Star Citizen in passing, so I really don't know why you posted it.
Basically, nothing you have shown backs up your claim that Star Citizen will support 16K resolutions. So please can you stop spreading this kind of misinformation.
"CryEngine is a reasonable engine" 
yeah it really is, since it's upgrade it's the best engine to make 1:1 high fidelity games across galaxy's since it's the only one supporting 64 bit's scope!
**snipped irrelevant video**
For the love of all that is holy, please stop with this rampant fanboy nonsense.
Even with the 64bit update CIG have stated that the systems in Star Citizen will be about 1:100 scale.
The Gamescom presentation revealed that system maps will be about 100,000,000km, which is about 0.67AU. This is not even enough to cover the distance from the Earth to Mars (~1.52 AU), so there's absolutely no chance in hell that Star Citizen will ever be able to do a 1:1 scale space game. This doesn't really matter from a Star Citizen point of view, as they are not even
trying to make a 1:1 game. So claiming otherwise is just nonsensical.
Also, there is
no galaxy planned for the game, just ~100 systems (and most of those won't be ready by initial launch according to reports from CIG.