Good news for people who shop for games on Steam! Product listings are going to get a lot more honest. Valve has adjusted its guidelines. From here on out, developers and publishers are only going to be allowed to have actual in-game screenshots on their pages. No in-progress or concept art images.
Valve sent out emails to Steam developers explaining the change. It acknowledges that the guidelines for the product pages hadn’t been exact enough. So the company decided it was necessary to offer some clarifications. The exact wording from the email says, “We ask that any images you upload to the ‘screenshot’ section of your store page should be screenshots that show your game. This means avoiding using concept art, pre-rendered cinematic stills, or images that contain awards, marketing copy, or written product descriptions.”
Apparently, this hasn’t taken effect yet, or Valve hasn’t started really enforcing it. If you check the No Man’s Sky Steam page , it still has the in-progress screenshots that are pretty misleading. Maybe they’ll be swapped out soon?