Don't give up hope on an exploit for higher firmware, as it stands the current exploit is a great launch point for looking into further exploits. However, I would not hold my breath on using current devices for future firmwares. In fact, it is probably more likely that a softmod would come for future firmwares, unlikely as that is. For now, just relax, and don't update your firmware unless you NEED to. We really don't have much in the way of homebrew. It is still very, very early in the game.