I still have my doubts about how safe can a system that uses mobiles in general can be regarding crypto. Just to mention one stupid case: people loose their cell phones everyday.
There are too many wallets that are on mobile alreadyso this is just part of their chasing development.
Nothing new in short since most of the wallets are already in mobile phones. With what you have said about losing the phone, it's part of the risk and that's a natural one though its not related to the development but it can't be solved by the developers. As a user, we need to be responsible of keeping our phones.