How is this novel compared to e.g. the Microsoft Equation Editor, which uses a hierarchical, cell-based approach for describing mathematical formulas? I guess t

How is this novel compared to e.g. the Microsoft Equation Editor, which uses a hierarchical, cell-based approach for describing mathematical formulas? I guess this is a bit different since you can enter everything via the keyboard, while the MS editor requires you to select primitives from a menu. The UI looks very nice and minimalistic though, I really like it.