We already know a few things about the “QoL” (Quality of Life) device that Nintendo announced some time ago in one of their investor meetings (more specifically, it was introduced in the Corporate Management Policy Briefing/Third Quarter Financial Results Briefing for Fiscal Year Ending March 2014 which was held on January 30 2014). Here you can see some of the descriptions Nintendo gave about it:
At least, we know that it will be released in Japan and United States. The company has registered the name in the USPTO through three different trademarks.
The first one. You can check the trademark here.
The second one. You can check the trademark here.
And the last one. You can check the trademark here.
We will have to wait for future announcements about this mysterious new device from Nintendo.
Thanks, NeoGAF.