Reading the NPR interview with Miyamoto it seems pretty clear that Nintendo's philosophy on hardware isn't changing. Expect something cheap and low spec-ed.
I'd say the "main" part of the NX is a portable that can run games with Wii U level graphics.
There will be a dock or home console sidekick that plays the same games and maybe is able to run them at 1080P instead of a lower resolution for the TV.
It will have a Nintendo OS, but an Android back end would be my guess to allow for easy porting of Android apps which Nintendo will charge a licensing fee on, since they make a shrinking pot from traditional third party licensee fees.
People expecting a PS4/PS5 killer are going to be about as dissapointed as Metroid fans were at this E3, I'd start scaling back expectations like now.
