If you already know what JupyterLab is, then I don’t have to tell you why this might be exciting/useful. If you don’t, well, here’s what JupyterLab is:
JupyterLab is the next-generation user interface for Project Jupyter offering all the familiar building blocks of the classic Jupyter Notebook (notebook, terminal, text editor, file browser, rich outputs, etc.) in a flexible and powerful user interface. JupyterLab will eventually replace the classic Jupyter Notebook.