Coming from an interview with Charlie Scibetta of Nintendo:
“Every year we look at it fresh and don’t think about what we did the year before. It’s about what we want to talk about this year and how we want to get the word out. For future years, it could be an execution like we did this time, we could go back to a presentation, we could do more Treehouse Live, we could go to a digital event, we could do something new.“
Looks like Nintendo is still willing to do stage presentations in the future! Fingers crossed!