well, while I dont deny similar thing exists, I will need to see some screenshots of those clipboard managers
the uniqueness as I imagine it, is that it can store data in table with cells (or in columns and rows if you prefer) where the position of a cell, means something for the data of that cell (for example if the second column contains surnames, then you know that the text of the cell "James" is not a name, but a surname)
most, if not all, clipboard managers, afaik, store data strings, not data tables, ie. one text line below the other, or multi-line text strings one below the other
how can I save a table in this format?
additionaly, a popup that will follow cursor and it will be easy to choose (with various keyboard/mouse methods) a specific cell to paste, is also a part of what I imagine