Honestly, there is probably solid use cases for simplifying data exploration especially when dealing with large amounts of data. I have myself (as probably every developer in finance and many others) have tried to think of ways to build upon the intuitiveness and usefulness of the spreadsheet paradigm while making it more powerful.

And if you can find a good way to do this along with a solid interface that non-programmers can use (Excel is the master at getting non-programmers to program), there is probably a lot of money to be made.

Honestly, this looks like a query and analysis system that could be built on top of a column store so you don't need to deal with the storage part of the system yet. (I'm a big KBD+ fan).

Good luck. I starred and watched the repo just to see how it progresses.