The Flower developer diary is interesting. It could do without the Sony PR push, but then Flower probably couldn't have been made as it is without the Sony PR push, so you take the good with the bad.
I don't think I buy the "video game version of a poem" concept. Passage is a video game poem. Flower is a novella. The problem is that most video games are the equivalent of doorstop fantasy - next to George R. R. Martin, most modern literature will look like a poem. By this I'm not just referring to length, but content and structure - Flower progressively presents a theme and has a beginning, middle, and end, just with minimal filler. Actually so does Passage, so maybe I should consider something like Tori Emaki instead. This is a thing that eschews the literal for the aesthetic, which Flower and Passage do not.
It's interesting to see Penny Arcade claim "there isn't enough "product" here to be satisfied" when their own game came under fire for much the same thing at twice the cost and 2-3 times the play length, but far more filler and recycled game mechanics. That may be the video game equivalent of pulp fiction (it's even serialized).