Movies will not replace books, the Internet will not replace movies, etc. But in the case of Flashcards + AR the situation is more subtle - gadgets do not replace table games - this is an obvious idea. Less obvious - AR technology in its current imperfection can not effectively replace more simple let’s say video-technologies. At the foot of the pyramid of Cheops, neither her photo nor her AR-model is needed.
At the same time, this application is the step that should be taken to understand the next steps in the AR technology development.