Let's be fair, the futures are created merely because it is a great way for exchanges to attract new customers and generate larger volume, in turn resulting in higher income.

As for the uncertainty, I am quite sure that the Bitcoin futures are cash-settled, meaning that the buyer or seller of the contract gets the difference between the market value of the asset and the contract price, ETH, in this case, added or deducted to their account. No ETH is actually transferred.