title: Bookmark look up confusion
body: <p>New versions of SQL Management Studio render a bookmark lookup as in the picture below. That makes me think the operation is independent from Index Seek (and can run in parallel?). Shouldn't Index Seek finish first? Its output (physical row IDs) is the input for Key Lookup, right?</p>
  
  <p><img src="https://i.stack.imgur.com/xbAoN.png" alt="Execution plan sample"></p>