Conditional formating

This would be cool:
Like feature of for instance PowerPoint, the ability to have fields or whole rows have a certain formating depending on the value of certain fields.
So, for instance, have rows be printed bold if a field "priority" is set to 1. Or things like that.
I think that the option to make a row/field bold and/or have a darker background would be sufficient. Maybe have a choice of some colors.