As much as the advantages abound because of the default nature of what its going to come with the phone, the point of discussion is the end users. I don't see this going anywhere though or say reach the amount of impact the proposers of this project will get because of certain reasons:

An average phone users does not get to use to the maximum the default app on the phone without adequate information. Even application that are not crypto related are still having low patronage compared to this. When the end users don't know about crypto, the app would just be one of those "unnecessary" apps on the phone.

Another reason is I don't see someone who is exposed to the various reputable wallets now giving that up for an app like this because knowing the anonymity part becoming a thing of the past is enough to consider other options.