Seen the conference but couldn't reply due to work, so I will probably repost what many people already said
Perfect reveal and platform choices.
PS4 looked great, and even if the town part looked a bit rough, the overworld part was really beautiful. I'm sure we'll see some combat and some NPCs at TGS too.
3DS was surprisingly even better, with a choice fitting for the 30th anniversary. Really looking forward to see more differences and how the sprites really look. Actually preferred this 3D artstyle for the characters too.
As others, intrigued by which version NX will get, and how different it will be (lower/better graphics, special gameplay/controls?, etc), but I think this at least confirm that Nintendo convinced some big names, even if it's not an exclusive. X and XI being launch titles would be great selling points in Japan, even if they are already released. If it's simultaneous with PS4... (I can see that happening in the west).
Anyway, really looking forward to hear more details about the game, less technical (no point for now after this reveal), and more about the story, gameplay, etc.
edit: also think that the 3DS version might be released first, but still think both will be localized. Would make no sense if the story is the same for both.