On recent trips to art museums, I have noticed a very disturbing trend. Most museums have video projectors that are clearly hooked up to computers. Some are projecting art, others are projecting descriptive videos (usually as a loop). In the case of the projectors with art, some are noticeably older and lower resolution than others, which usually results in more pixilation of the art.
Yes, budgets are tight: they always are. But using old, lower-resolution projectors for art is just plain lame. Buy new projectors. Also, if the art was converted from film to computer, re-convert it using the highest resolution possible. When it was converted the first time, the resolution might have been limited to match the projectors at the time. Re-convert. Don't force your patrons to view crummy reproductions.