Well the problem is that a script can't "hide" anything (I am aware of some of the amazing new crypto ideas thanks to James but as of now they are not practical - nor will they be in the foreseeable short term future) so I don't think this is something it could be used for.

Another idea that has been suggested is a form of "hedging" where you might bet that Asset A is going to be worth more than Asset B at a certain time (or vice-versa).