It has always been the idea of Gnosis that prediction markets are such a powerful concept that lots of individual project would exist on such a general platform.
Here are four ideas for such projects:
Difficulty forecast/ virtual mining contract.
A app focused on predictions of the difficulty. Note that this does not need a third party oracle since the difficulty is an available data point for smart contract (see code). This add could be presented in different ways to the user: first simply: predict the difficulty. 2. "hedge you mining investment (hedge against high difficulty) or 3. as a virtual mining contract.. If you pay upfront a specific about to buy hashrate for a month and your overall payout depends purely on the difficulty - then this can be done perfectly fine with a prediction market. The advantages are that there is no counterparty risk for the person buying the hashrate - the disadvantage for the "seller" is that they need to commit this capital upfront.
Binary options market.
Develop a binary option market for the Ether (and potentially other) prices. The prediction would be wether or not the ETH price would raise or fall during a day/ hour. As an oracle "https://www.realitykeys.com/" can be used. Ask us for help integrating their data into our oracle contacts.
The minimal DAO. It is a contract that can hold funds/tokens. Anyone can make a proposal that this contact executes a specific call. Such a proposal will create 3 markets. a) will the proposal be implemented. b) if it is implemented - what will be the price of a specifc token in the future. c) if no - what will be the price.
The DAO will automatically implement the proposal/ or not - depending on the markets b)c).
Use this DAO to let it play a game of chess/go/ connect 4 or whatever.