Excel already does this except for the variable column width.

One can select a cell inside a table-like range and click "Format as a Table" to have Excel automatically infer the range of the table (including the headers) and enhance it with database-like features. One can then refer to columns in formulas using references like so: `=[@[first column]] + [@second_column]`. Modifying the formula in one cell will also update all the cells in the same columns. The table object becomes accessible using labels (e.g. `Table1`)

Very useful!