I think it could be nice if there would be automatic linking to other answers/questions, such as Youtube's automatic link to a specific time in a video (in comments, if you type 1:25 for instance, it will be automatically hyperlinked to jump to the 1m25s mark in the video).
There could be some RegEx parsing added to recognize question/answer ID and automatically hyperlinking it, for example:
...This question was answered [here][#156]
could be translated into:
This, however, would not be practical, because nobody remembers question IDs. Therefore, while it would be nice to have, this approach would not work well.
Perhaps if the search was improved, specific answers could be found more efficiently...