[lokelow]

> - Spaces: The animation tells the user what is going on! Having the entire screen change instantly would be confusing for the vast majority of users.

The video the author links from Minority Report of an "incredible and desirable" UI, has animations seemingly for this exact reason. One is basically the same as Spaces. https://www.youtube.com/watch?v=PJqbivkm0Ms

I think UIs that give intuitive feedback are the best UIs, even if they are a tiny bit "slower". I'm happy to memorize a bunch of VIM commands because I write code everyday and it makes me much more productive, but I don't want to have to do this for every application. Especially once we start physically interacting with them.