I guess I'm not really seeing how NES/Super NES or Game Boy/Game Boy Color/Game Boy Advance are magically any more informative than DS/3DS or Wii/Wii U. They're all throwing prefixes/suffixes on to delineate the difference. Is it just because the prefixes/suffixes are shorter now?
It has to do with the prefixes/suffices meaning something on those other systems. Super and Advance both imply an upgraded, superior version of the original system. What does a U imply?