[ mona / prog / sol ]
Well an example would be that if you're in a S-expression and not in a comment or quote you could effectively have paredit bindings working on the inferred S-expression. Many of these operations would have analogous uses in plain text for example you could snarf a word into a sentence, or move a sentence within a paragraph without the explicit act of selection. Here movement influences selection, but it is not selection, in that the selection is inferred from context rather than most movement commands leaving behind a mark for example. If you wanted movement to be selection you would have to explicitly enable it with C-SPC, as you do currently.