For me, it's still "proof of concept" right now. It's interesting because Python is much easier to use than VBA. Where I work, we use a lot of Excel and data from various sources. The ability to leverage Python code can be a big deal for me.
It's been possible to script Excel (and the rest of Office) using Python for probably 15 years now. I'm pretty sure the COM package is included with all the Win32 Python builds, but if not it's just a package install.
It's a bit disappointing that so many people don't learn about the tools they're using.