It needs a sustainable glow of good games to be successful. It needs to have an exclusive software output greater than either the Xone aor PS4, to make up for some third party titles not releasing on the Switch. A single game might sell great but it will not make the console a succes. Mario Kart Wii sold 30m and even though Mario Kart 8 sold great it couldn't save the Wii u.
Please excuse my (probally) poor grammar







