> In traditional flat spread sheets, you have to have the ability of hiding columns or rows to hide intermediate results. This indicates that two dimensions are not enough, which is why teapot is three-dimensional. The third dimension can be imagined like multiple layers on top of each other, usable without the awkwardness of multiple worksheets in established spreadsheet software.

I really hope it supports multiple worksheets in addition to the 3D! Additional worksheets usually contain data that's by nature best indexed from (0, 0, 0). I'd rather write @("Items", x(), y(), 0) than @(x(), y(), items_offset)