This looks nice. Now if only somebody wrote a Jupyter kernel for (power)shell.
Have you seen Azure Data Studio? It uses the same code base as Visual Studio Code and has first class support for notebooks. It includes a PowerShell kernel
On the .NET team, we're working on a polyglot Jupyter kernel that includes C#, F#, and PowerShell support. We're collaborating with the Azure Data and PowerShell teams. It's in preview now. https://github.com/dotnet/interactive