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I’m going to echo your question with my answer - Legend of Zelda Wii U (final title unknown). I don’t have a Wii U, but I might get one just for a new Zelda game. I just watched the game trailer, however, and to be honest I wasn’t blown away in the same way I was for Twilight Princess or Skyward Sword. Still, that’s like saying the latest Porsche wasn’t quite as exciting as the 2007 model...it’s still pretty awesome.
Other than that, I suppose Sony’s Playstation TV is somewhat interesting. I’m not sure that I entirely understand it, but from what I saw it lets you use it as a mirror for your PS4 so you can play all over your house with only one primary console. Kind of neat. If I had a Vita, it would be cool to play those titles on my big screen.
To be perfectly honest, this is not an E3 where I expect to see many truly amazing announcements. The PS4 and XBox One just debuted last year, and the Wii U the year before that. This is a year where developers start to show they have learned the new systems and showcase new titles, but there can only be so many stunning AAA game title reveals.