It may sound strange, but I would like to see someone create a set of props of Polyhedral Dice. These are the multifaceted diced used in role-playing games. Considering that there a sizable number of gamers (people who play role-playing games) and people who use rendering programs (Daz and Poser) are the same, it would be a good project for development. Especially for those artist/gamers who are also writers who need original images of dice to include in the books they are writing/selling.
If anyone has any doubts as to what Polyhedral Dice are, a quick search on a search engine will give the answer.
I know there is at least 1 free product out there (no numbers on them and they do not look that realistic), but I feel there is a niche for a least one vender to sell these as a product.