retinax
Well-known
They look good on the screen but when compared to the print, the screen image looks like crap.
Ok sure, I've never considered the screen as a final presentation medium for fine art, for documentary work it has been for better or worse for a long time of course - most of us look at newspapers and photo features online.
It is mostly fine for editing, critique, looking at others' work for inspiration...
Progress has been pretty fast in this regard, in the last couple years phones and tablets have got very decent screens... some competition for photo books (which don't always have great print quality, either), perhaps, but certainly not for the print on the wall.