Nintendo and DeNA also plan to develop an online membership service that is accessible from smart devices, PC and Nintendo systems, such as the Nintendo 3DS portable system and the Wii U home console. The membership service, which is targeted to launch in the fall of 2015, will be built on DeNA's extensive experience and capabilities in online membership services.
From the press release.
This sounds good. Real good. A proper account system, finally. And it looks like the Club Nintendo successor too.
The best thing: Nintendo are letting someone else deal with the online account stuff.