>Arrow is designed to serve as a shared foundation for SQL execution engines, data analysis systems, storage systems, and more – think Pandas, Spark, Parquet, etc. Engineers across the community are working together to establish Arrow as a standard for columnar in-memory processing.

I like to think I'm fairly techy for a non-programmer but I have no idea what that means. That might be part of their problem if that is the description in their wikipedia entry.