We know that things like bulleted lists, headings, and paragraph structure can have a massive impact on readability... and I think those visual touches go even further.
Of course, just using icons doesn't do anything (And can make it worse), but if they are relevant, then it adds another layer of data. +1 on images and Gifs - I find it much easier to evaluate a project if I have some idea of what it looks like (Assumign it has a UI).