By now, everyone knows that the Nintendo 3DS can display stereoscopic 3D visuals, and that it has the ability to take 3D pictures with its cameras, create Miis, play Nintendo DS games and so on. However, the system also includes other, less-talked-about features that are pretty significant in their own right.

First up is MP3 support. The DSi couldn’t play MP3 files, but the 3DS can. It can also play AAC files. Since the 3DS comes with a 2GB SD card (and supports up to a 32GB card), it’s nice to have MP3 support present and accounted for. Like the Nintendo DSi, the 3DS will include a 3DS Sound application, which lets you listen to your music and manipulate sounds.

Next up is the online, which is receiving a major overhaul. The Nintendo 3DS will have access to an eShop that will be home to trailers and downloadable game demos. You’ll be able to rate and see how other consumers rated games based on these demos. The eShop will also be where you’ll be able to find Gameboy and Gameboy Color games via the 3DS Virtual Console.

The online store will be completely cash-based, not based on any kind of “points” system. You’ll be able to use your credit card to make purchases directly off the eStore, or buy a Nintendo 3DS Prepaid card at retail stores. At some point after launch, you’ll also be able to grab an Internet browser off the eStore.

A previously reported parental lock feature will allow you to restrict content on the 3DS via a PIN. You’ll have the ability to restrict access to games based on their age-rating by the appropriate country’s ratings board, as well as disable the system’s stereoscopic 3D output.

And finally, Play Coins. The Nintendo 3DS can count the number of steps you take while carrying it around. By walking, you earn Play Coins. These coins can be used to unlock content in compatible 3DS games and applications.

Oh, and just in case you missed it, the 3DS also comes with an adjustable stylus:

The system will launch in Europe on March 25th. UK retailer Game lists the price of the Nintendo 3DS as £229.99 ($368). Play is a tad less at £219.99 ($352). North America gets the 3DS on March 27th for $249.99. Finally, Japan gets it a whole month earlier on February 26th at 25,000 yen.