Might as well post this, as this is the only verified leak.
"As promised, I've decided to share some more NX information with you. This is second-hand information from trusted sources (like last time) and I have little reason to doubt its validity.
Here you go:
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x86 architecture.
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Backup data to Nintendo server (most likely My Nintendo).
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Support for additional screen.
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Can handle ports of current-gen games.
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Will be able to interact with smartdevice apps.
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Using NX software will unlock My Nintendo reward points."
"FlapSnappleThis user has been verified by the mod team. We have confirmed that he has connections to Wii U developer(s) and/or development hardware and very likely has knowledge about the NX via those same connections. This verification is sort of general/open ended and I unfortunately cannot verify specific details on a point by point basis."
This is the same guy that has been teasing info since before April Fools, but there was a lockdown on threads for NX info for three days for that. He also said that they(Pokemon Company) wouldn't show anything in the Sun/Moon stream before it aired.
Lock and delete if necessary.