I think the first three points will satisfy a huge audience straight up for:
To incorporate an iOS or AppleTV like wiggle on Movie thumbnails, to give the ability to group Movies, edit (for metadata) or delete would give some flexibility for local content.
However further down the line, I would think with network streaming you would only see the folder structure from an AFP/SMB source, which would most likely use cover art, such as folder.jpg for folders just like aTV flash.
Keep up the good work! I’m loving the clean interface