Here is a thought. Print it on canvas, which will further reduce the detail (or reduce the importance of detail) and most people would think of it as an oil painting. Such ambiguity (is it painting or not) helped me sell a single picture multiple times in art fairs (though the ambiguity was not coming from a deliberate blurring, but as a natural effect of rain on glass). Otherwise, I believe that a photograph should be reasonably sharp, as inherent to the medium, unless there is a compelling reason not to.
