Flower is often cited as an example of how beautiful games can be. Part something about flower petals instead of guns, but it's also to do with how beautifully the environment moved and responded to you. So, as a PS4 launch title, it's a good example of how visuals have improved since Sony's last generation of consoles.
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I wonder, if you bought the PS3 version of this game will you be able to re-download it on your PS4 for no additional cost?