Some people are way too hung up on the conference being live. The Direct delivers virtually the same information at the same time, and is probably more succinct as well. Whether the conference is live or pre-recorded is irrelevant.
The stream itself isn't that important. Most people don't sit through all 5+ hours of live conferences at E3. They're more likely to be skimming sites like IGN or Destructoid all day for the latest news, and the type of conference Nintendo holds has no bearing on how these sites will cover their content.
All that matters is what Nintendo brings to the show. If they have exciting new games to talk about, people will listen. If they bungle it and show the same stuff as last year with one or two new things, most people won't care.
Now finally getting to the meat of this, the Treehouse event sounds similar to the Developer Directs from last year (which were outstanding). I'm excited for the Best Buy event again, and actually I think it's better for only being Smash Bros. And the Smash tournament sounds awesome. It's a great idea to involve the competitive community and drum up hype for the new game.
