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We should disambiguate the term "jupyter notebook" here. Jupyter notebooks, as documents that contain code, markdown, math, widgets, etc., are a central feature of JupyterLab. Jupyter notebooks are not going away, and are getting better in JupyterLab.

The "Jupyter Notebook" web application (i.e., the browser application that was originally released in 2011) will eventually be replaced with JupyterLab.

Having used JupyterLab alpha extensively, I don't think so. JupyterLab makes the 'notebook' one type of document, rather than the only type of document.

So it extends Jupyter Notebooks by giving you new IDE-like features, whilst retaining the ability to write notebooks.

> JupyterLab 1.0 will eventually replace the classic Jupyter Notebook. Throughout this transition, the same notebook document format will be supported by both the classic Notebook and JupyterLab.

Guess so :-)