The video highlighted an annoying feature of Squeak Smalltalk, where you get tiny little views of individual methods in their own window, which seems like a good idea until you actually try to do something complicated using it. It's pretty to watch though.

The cool things there, in my opinion, were the code navigation pieces. Those are the things I actually think work better with tabbed files.

In other news, yikes! I seem to have started an IDE vs. Text Editor flamewar. Sorry about that.