We know what you think this hands-on is about. That laptop you see up there has a Tobii eye-tracking sensor affixed to it, and you're probably wondering why we're still dwelling on it after getting hands-on twice at CES 2012 and once more at CES 2013. But that's not what we're here to show you today. While wandering the halls of Mobile World Congress, we came across NUIA (Natural User Inter Action), a German company whose software is designed to make
