Except that we've already had Iwata say numerous times that it won't be a hybrid. Not only did he specifically say that he wasn't looking to make two consoles into one, but he also said that he wants the console & handheld to be separate but "like brothers" & is looking at multiple form factor of one platform (same architecture, same OS, different form factors & power levels). Your confidence is misplaced, & was already shot down.
Whether or not that ends up being true, there's no reason, with today's technology, that the system shouldn't be able to connect to a television wirelessly if a player wants to play on their screen, and being able to sync other NX or Wii Remotes/Pro Controllers for single screen multiplayer would be a fantastic feature.
I'm not saying it will take the place of Nintendo's next home console, but there's no reason not to allow it to function as one if the user wants it to.