Anyone voting for "betraying Sony" clearly fails to comprehend the situation.
Nintendo shot themselves in the foot.
I don't know how much the rest of you know about Japanese culture (I'm an expert), but honor and shame are huge parts of it. It's not like it is in America where you can become successful by being an asshole. If you screw someone over in Japan, you bring shame to yourself, and the only way to get rid of that shame is repentance.
What this means is the japanese public, after hearing about the betrayal, did not want to purchase Nintendo's system, nor will they purchase any of their games. That was HUGE. You can laugh all you want, but Nintendo alienated an entire market with that move.