I don't want to come across as a Poser or Daz loyalist, but those high-end images are not all THAT impressive. Very nice, to be sure. But keep in mind that if you're a top professional artist working on commercial projects, you are going to have to use the high-end industry standard. That also means you are going to have to have the professional skills that make superb work like what we see possible. It's the trained professional artist's eye, more than the technology, that makes these works so impressive. Furthermore, the better models we're exposed to seem to have only one pose, and a lot of them are just heads. I have yet to see a clearly superior high-end realistic model that looks good in full anatomy shots and many different poses. And of course, a lot of these images have postwork (as all professional still images should.) It not that hard to cover up flaws in postwork.