- Snapshots taken at tilted angles (so the horizon isn't perfectly level).
- Vehicles that are available for Residents other than the owner to drive.
- Vendors/stuff for sale using click actions so we don't have to unpack boxes.
- Pose sets for groups of friends.
- Memorable talks where the presenter's avatar moves around the stage (don't just sit/stand there, do something!).
- Marketing for inworld products that get viral attention outside of Second Life.
- More useful templates and workflows shared for content creation.
- Live DJ remix concerts (like Richie Hawtin or BT's, both with their stunning own approaches).
- Senior citizen avatars. A retirement home or two.
- Eccentric, wealthy (not just in L$!) art patrons.
- Blogs focused on cool gadgets (like Engadget and Gizmodo do for 1st-life stuff).
Off the top of my head, of course. All these we can do today, it just takes the right people to put them in action.
If you know exemplary examples of any/all of the above, let me know. 
