Im probably the lonely voice in the woods but I will put it out there with hopes I dont take too much abuse....after all guys....this is a catfight were talking about.....not an amendment to the Constitution.....anyway.... the 4K file....while I think suitefights is again demonstrating awesome customer service by offering up the 4k format clip.....if one were to peel back the onion a bit more there are 2 issues worth considering......specifically....file size and hardware requirements that allow for a 4k video to work properly.....while I dont know the exact size of the clip.....id venture to guess it is many gigabytes of data.....VERY LARGE....one could imagine multiple download failures as a result and much frustration.....then assuming you do somehow get it to download....in order to appreciate the image.....we are talking very high end graphics cards.....DRAM.....processor time.....etc etc.....id venture to guess a tiny fraction if any have the computer to support the capability.....so you end up with a really large file which looks very similar to the other 720 and 1080 formats......so what is the point......and besides.....the 720 clip is as sharp and clear as any video I own....I mean.....if you can see the little nipple hairs on the girls.....id say you got a damn good image.....so for me.....major props to Suitefights for offering up an emerging quality capability.....but in reality.....I doubt many....if any of the fan base will actually be able to appreciate the effort put forth in order to receive it.......just sayin....if you go with the 1080.... (1020....? I forget)....your eyes will be most pleased with the result...
It is often the adult entertainment business that pushes forward with new tech. The difference between 720, 1080 and 4k resolution formats is actually really quite different. It is like comparing the video quality of a film, DVD to Bluray... or a 1 megapixel, 2 megapixel and 8 megapixel camera image.
If you are interested, i would suggest you go into something like a TV shop and ask them to show you 3 separate TVs running each resolution for comparison. I would be surprised if you still do not find it noticeable. You of course need a large display to see it and on a small screen you likely cant tell the difference.
Regarding file size, that is a relative term to be fair, your large might be my small (lol...). But as a for instance, I have over 1TB of data storage available in my PC and another 3TB of external storage in a couple of portable hard drives.
The hardware requirements for being able to play 4k video (monitor/TV aside) is actually much lower than you think. A low to mid end modern PC that can run games from the last few years will handle playing a 4k video at 60 frames per second no problem at all. And you for sure do not need a high end expensive graphics card.
At the end of the day it is a videophile thing to be honest, and 4k video cameras are NOT cheap, at all...seems a shame to not put out that quality of recording when you have captured it at that level. But you are right, most people will be perfectly happy with 1080 videos (including me) although i will certainly take the 4k version if it is dished out.