For the last 3 years, the Apache Arrow project has been developing a language-independent open standard in-memory format for tabular data and a library ecosystem that builds on top of the format. In this talk I will discuss the current status of the project and Ursa Labs, a new not-for-profit development group I founded to focus on Arrow development. I will give a preview of our Arrow development roadmap for 2019 and how it may impact the Python data science ecosystem.