Symbol Fill for Data Series (Unicode Character)
The use of the Unicode symbols (like emojis, emoticons, etc.) is already becoming more pervasive in online and mobile apps. Many of these symbols could be used for pictographs - meaning using Picture fills for bar and column charts. However, Excel doesn't have a "Symbol Fill" option for data series. You can create your own small image and use that as a Picture fill, but I would like to see a "Symbol Fill" option that lets you include any Unicode character that you want.
This may be useful any place in Excel where you have the option of using a Picture for a fill (background, data label, etc.).
Alternatively, the "Online..." option for inserting a picture could include a category for the extended unicode symbols (emojis, emoticons, etc.) so that there would not be a question about usage rights that comes up when using the Bing Image Search option.