Mr.Mumbles: While I agree that omitting such in the screenshots is a dumb thing to do... you should actually watch the trailer, which will give you a better idea.
I only bother with videos once the screenshots have sold me enough to investigate further. Videos otherwise are a waste of time and bandwidth.
LifeLover: Only Singleplayer "feature"?.., no Achievements, no Cloud Saves and other cool features?
¯\_(ツ)_/¯ Sometimes I think "all / almost all Gog team - are lazy ass." Maybe I'm right?!!, because when you go to Steam and see great amount of games, that has all mentioned features and even more, this is what comes to mind - Gog team - are lazy ass...
It's a placeholder for now. I'd be surprised if the game doesn't have "cloud saves" once it's released. (GOG generally implements them, rather than the developers, so long as developers don't do weird stuff, like a lot of the Adobe Air games do...) These are put up when GOG knows about a product coming in the future so people can wishlist it/ask to be notified on release, and so people don't "I bought it on Steam because I didn't know GOG..." for those people who someone still excuse their own use of Steam.