I love .NET and I love Jupyter. I don't know how well they will combine though. I feel like the lack of Pandas and flexible typing of Python will make it a lot less useful.
Even better if it works well with Deedle and FSharp.Charting. But I'm not going to demand everything on release day.
There are a couple of efforts to build .NET wrappers around Pandas, or to reimplement Pandas in .NET; see http://scisharp.github.io
I am really excited about the new Data Frame from corefxlab to complement what Deedle lacks. Since Deedle's original core engineering team has left and moved on, some core technical debt are beyond my capability to address. But Deedle is still the best data frame library in .Net ecosystem for now if you are able to get around some of its odd edges.