[kragen]

You should probably fix that, because lying about your product in order to get people to buy it is fraud. Even if you don't care about the ethical issues, it could have negative repercussions for you in the future. It looks like it's good enough that people would buy it even if you didn't lie about it, so I think you should capitalize on that. (Maybe you disagree? People who notice the lie will think you don't think it's good enough to sell without lying about it, and they'll wonder what else you're lying about.)

Also 300 dpi is coarse enough that, despite my aging vision, I wouldn't need a magnifying glass or particularly good light to see the jaggies from 300 mm, and I think that is a reasonable viewing distance for wall art. 300 dpi is definitely not a "gold standard" for coffee-table books or wall art. Someone with good vision, the right light, and a magnifying glass can see features at 2400 dpi, 64 times the number of pixels you're using. Why do you think Linotype made 2450 dpi the Linotronic resolution 35 years ago? Perhaps you think they didn't have any experience with printing?