Notebook Programming, typified by platforms like Jupyter Notebooks, Observable, or Google Colab, is a popular—and still rapidly evolving—programming paradigm today with the dream of a fast interactive programming workflow at its core. In this talk we’ll take a look at a spectrum of ideas from different systems on what future notebooks should and could be. I’ll share some of our own recent work, mage, which extends the possibilities of live programming in notebooks from parameter tuning widgets to direct manipulation of full complex GUI tools that produce code in-situ.