The key distinction between Eli's approach and mine has to do with the primary approach. Eli is enhancing a spreadsheet. I'm approaching the problem as a new programming approach.

I'm suggesting that you could change the linear, time-oriented evaluation of code within your program without explicitly using a spreadsheet. This change of control flow based on spreadsheet-like dependency gives new freedom for things like distributed computing. Also unlike spreadsheets, there is no need to update only a single cell.