I just had an idea. What if there is a tool which algorithms create a brain wallet password from the fingerprint (or from multiple fingerprints of the hand)? Every fingerprint is unique. Therefore every password created by the algos will be unique, too.
Thus, one would never run into the risk of losing his or her password anymore. Perhaps there is something already. However, I do not know it.
It's a pretty good idea I'd say, and I don't think that anyone has designed a wallet around this concept yet. You might want to look into getting someone to develop the idea or researching if anyone else has put the time in to make something like this. It might be a huge thing if no-one else has done anything with the concept yet.
Anyone designed a wallet with this concept. This will be a huge steps for Bitcoin if it is going to happen