that tiny thing above the abxy buttons is supposed to be the 2nd "analog stick" of the new nintendo 3DS. other than that, gameslot was moved to the front, it now only accepts microSD, the regular model has slightly larger screens, the XL stays the same in size, the battery life was extended, additional shoulder buttons were added.
i fell like they could've just put the abxy buttons lower (where the d-pad on the left side is) and put a full-sized "analog stick" above it, so it would be kinda symmetrical, and not that tiny, but well, we'll see…
microSD only is bullshit too, they prbably want to prevent me from moving my stuff from my old SD to the new system or what? or is ther an online system for that (i know nintendo is kinda slow when it comes to that, but eShop should be like steam, werhe you log in and have access to your bought stuff from any device, or maybe a only one account per device policy with the possibility to reset the device for resale etc.), i don't know, i didn't keep up with it that much, because i didn't move to the XL and therefore didn't care until now.
i guess that also means i, who certainly won't buy one on or shortly after releasy, will have to run around with the hideous 2nd analog stick attachment, since there is a high probability that more games using two analog sticks will be made now.