You heard that right. Twitter is making changes to its 140-character limit, links to media and @replies will no longer count in its usual limit. Also, that irritating .@mention will no longer be used.
Twitter stated that it hopes these changes will help people engage more and have a more detailed conversation. In chains with several people mentioned, replies get increasingly shorter until the discussion dies off.
Pictures, video or any other attachment will no longer count towards your 140-character limit also. It only applies to the media you upload directly to Twitter so links to your Instagram pictures will still count. Thus, any link will still take up its standard 22-characters in your tweets.
Twitter is also adding a retweet button to your own posts so you can rekindle older content. Nice feature.