I liked the Treehouse too. It really made the company feel so open and positive for idea exploration and innovation.
On one side you have the suits of Microsoft and Sony, and on the other side (ala Facebook/Google/Pixar) theres this image now of open wide offices, couches everywhere, and everyone is happy at work and polite to each other.
It's a nirvana working for Nintendo i guess. 
“When we make some new announcement and if there is no positive initial reaction from the market, I try to think of it as a good sign because that can be interpreted as people reacting to something groundbreaking. ...if the employees were always minding themselves to do whatever the market is requiring at any moment, and if they were always focusing on something we can sell right now for the short term, it would be very limiting. We are trying to think outside the box.” - Satoru Iwata - This is why corporate multinationals will never truly understand, or risk doing, what Nintendo does.
