Among The Sleep developers, Krillbite Studios, have announced they're working on Mosaic [official site] - a game which Killscreen describes as being about "the malaise and existential surreality of being an adult". They also quote the artist Bjørnar Frøyse saying "It’s about being a small piece in this big machinery that you don’t feel anything for."
So I guess... the absurdity of the mundane while working a white collar job? The point here is that it sounds like they've very much switched their focus from the childhood scares of Among The Sleep to adult fears.
Krillbite aren't saying much more about the experience but the Killscreen article has a couple of sentences about the introduction:
"As your day starts off like any other — passing through security, settling in front of your terminal — you’ll start to realize that something is askew about your respective role in this fluorescent-lit farm of cubicles."
The artwork being used to illustrate the piece plus that brief description have led me to thinking about Molleindustria's Every Day The Same Dream. The latter is only a few minutes long but deals with that exact subject really interestingly. I really love it and recommend you play if you have a few moments. No idea if Mosaic will end up being remotely similar in tone or anything but if you're looking for white collar existential musing then it's a good place to start.
As for Mosaic, you can sign up to the mailing list for updates via the Mosaic website if you fancy. Also, if you're like me and Into That Sort Of Thing then the site has a nice visual effect as you scroll down.