Tbh even though they said they'd do stage shows for hardware I doubt they'd do one for NX, I think we'll get an official announcement months before E3 and then the digital even will focus on NX mainly with Zelda and SMT#FE as the U's swan song and the last releases for the 3DS as I can see NX being a fusion like platform.
The current format they use for E3 is fine as they have more control and less likelihood of any technical issues, the Treehouse can then focus on the last Wii U and 3DS game as well as have a better look at the new platform.







