I believe the pink plane comment is a reference to Alan Kay’s idea that there is an entire “blue plane” of ideas that lie orthogonal to the “pink plane” that people live/think in, that only becomes unlocked with a change in perspective (“looking up”). He talks about it in his How To Invent the Future talk.

https://www.startupschool.org/videos/11

https://www.startupschool.org/videos/12