They're going way too long without any info, which causes too much pent-up hype and ensures disappointment. Iwata should have shut his mouth last year, or just said that they're still working on their next system instead of giving a codename. They way that they're handling this isn't a sign that they've done anything about their poor marketing either. Their E3 plans tell me that their marketing team is even worse than ever. Really, they would have been better off dropping E3 completely and just having a Zelda Direct while having Zelda demos playable at Best Buy or something. All that they need is a botched reveal and underwhelming gimmick, and we have Wii U Too.
Read what you're writing. Does this affect the games? The release schedule? Will this make any difference once people have the console and games in their hands? Does it matter they only had Zelda playable at E3?
These are obviously things that should be discussed, but honestly, you're getting way too worked up over this and focusing on what you (think you) want instead of seeing things for what they are, or in this case, waiting to see. You're not the only one of course.
Just... chill.