According to a report in Andriasang - citing Japanese business newspaper Nikkei - the Nintendo 3DS will allow users to install games on its internal storage media. While it wasn't stated in the report that some type of digital rights management would be a part of that equation, it is probably safe to draw such an conclusion assuming it's all true. Is this Nintendo's way of dealing with whatever R4 device is made to copy games on the 3DS?
According to Nikkei, 3DS users will be able to copy or install 3DS software to internal memory. This allows for multiple games to be stored in the system and gives users the ability to switch between them by selecting from the system's main menu. The paper goes on to say that this feature makes it so that users won't have to swap cartridges to play games.
Naturally all of this is unconfirmed by Nintendo. We'll follow this story as it develops..