If there’s something that’s to be sherlocked [1] in 2025, this would be it! There is a very high motive and incentive for Apple to make something like this part of the OS annd it’s probably working on something similar. Apple can also do it (though probably not as quickly) with minimal privacy concerns.
In some ways, this app reminds me of Windows Recall, which has been heavily panned by privacy and security critics. Do we want a third party app to be looking at everything we do? It would have to meet a high bar on privacy.
[1]: referring to the computing term at https://en.m.wiktionary.org/wiki/Sherlock#English