To extend the thought, 72 DPI has been the minimum recommended density for working at a desktop. For closer materials like magazines or photos, it was I think 3

To extend the thought, 72 DPI has been the minimum recommended density for working at a desktop. For closer materials like magazines or photos, it was I think 300 DPI, since you might get closer. It's one of the reasons mobile screens got more dense, so that when you hold it 30 cm from your face things still look smooth. So... if your average viewer will be farther away from this wall than a desktop user, the DPI can go down and still be attractive. Edit: the not-science-backed chart here seems to track http://resources.printhandbook.com/pages/viewing-distance-dpi.php http://resources.printhandbook.com/pages/viewing-distance-dp...