I would imagine that it's rather common for companies to want be able to show inline images in the description of an issue. (using the NEW jira issue view).
Today, that can only be done if we upload the attachments into the jira issue. We are a company that takes security seriously - and allowing 3rd party companies (like Jira) the ability have their own data store of our images/attachments is not ideal for security.
We (like many other companies) use a third party app for taking screenshots, where we can manage them. After taking a screenshot it auto uploads them to a URL which we can easily control. The ideal user behavior for us would be to:
1. observe a bug or issue that I want to screenshot/record
2. take a screenshot (using cloudapp) which then automatically creates the image URL of the image
3. go to jira, create a new issue and in the description type  which would show the image inline.
The new jira issue view already supports some markdown already so adding markdown inline image support would be very valuable.