Update: There might be more to this update than originally thought. Check out this interesting tweet from developer Syrenne McNulty:
@Wario64 I can't say what, but there's absolutely something more in there. It's readying for something.
— Syrenne 3DS McNulty (@Sycoraxic98) July 8, 2014
Nintendo has released a new system update for 3DS, bringing the firmware up to version 8.0.0-18. It’s nothing too major though – Nintendo’s website states that it makes “Further improvements to overall system stability and other minor adjustments” in order “to enhance the user experience”.
Note that you’ll need to download today’s firmware in order to access the 3DS eShop.