I much more prefer what we see in early access titles, Kickstarter campaigns etc. Deliverance: Kingdom Come is a nice example, where we have seen lots of footage that already looks impressive, from trailers, video updates and earlier live streamed ingame builds. It's all very much ingame and portrays the end product much more realistically than any target render ever could. What I'm saying is that I'd rather first see a worse looking, glitchy early version and see it evolve than see a misleading target render with a fair chance of the dev never being able to achieve it.
I know this sounds like a nightmare from a marketing standpoint, but the whole industry might be better (or more honest at least) if everyone accepted a practice like this. Make the less informed, more casual gamers get used to the development process and realistic expectations, without the fake glitter. Hell, movie trailers try to be as attractive as possible, sometimes even portraying an almost different product with good editing but at least they show the actual film, not something you'll never actually see in the end.
It just seems to me that all the CG trailers, target render footage and bullshots (even simple stuff like downsampled screenshots) are meant for the majority of people that know jack shit about all this and just want to see fake, eyecandy bullshit. It obviously works but I'm definitely not a fan of it.
Not to get me wrong, I love CG trailers and cutscenes for what they are, ever since the PS1 days, they frequently show state of the art CG you almost can't see anywhere else, so they're like a subset of short films. I'm much more against misleading realitme footage and screenshots.