For some, this will be the worst news ever. For others it'll come out to no more than a shoulder shrug. I'm somewhere there in the middle.
Those hoping to import Japanese games for their US Nintendo 3DS are out of luck. Those wanting to play imports will have to buy a foreign system as a 3DS from one territory will not play games from another. Hell, it won't even 'see' the games.
As you'll see in the above video, a North American copy of Super Monkey Ball 3D will not even register in my Japanese 3DS' menu.