reConditional formatting (popularized by Excel) is one of the most useful ways to comprehend tabular data at a glance. I'd like to see SAS add the ability to conditionally format tables in a similar fashion to how excel currently does it. This feature should be made available in the PROCs most commonly used to display tabular data in ODS.
There should be options to:
choose color schemes (e.g. dual-white/red, tri-green/yellow/red)
choose midpoints etc
options to handle outliers (for example, in a table with 100 values most of which are around say the 30-40 mark, if there happened to be a single cell with a value of 100, it should not skew the formatting in a way that everything between 30-40 is about the same color)
choose the columns/rows to apply the formatting to
Off the top of my head, the main procedures that would benefit from this would be: