1. Front license plate frame and mount
2. Retractable sun shades
3. Dashcam mount
4. Faux grille
5. Fender flare
Tesla, you could generate a few $ if you sold these in-house.
Add folding second seats for a flat back and nearly everyone would take that option!
Good point. Remember that Tesla improved the seats on the S after owners made noise about it and I'd bet they are working now on a fold-flat design as an option. They need a revision ladder and can't give it all away on V1.
While Tesla Motors showed a center console for the Six Seat Interior, it may or may not be offered. If it is created, ideally it would be removable.
This is where third parties could fill the gap to provide an arm rest that still allows walking through the center seat area if desired.
Another possible accessory is the protection of the shiny seat backs. A cargo net or barrier would help where the missing center seat was not installed.
Good full vision sunglasses will help the driver and passengers to enjoy the full view through the front windshield.