There's no guarantee this feature will ever be finished and be playable, in either AE or as a standalone mod.
The scripter who created this feature left the team, and as I understand it, it wasn't complete anyways. I may look into writing my own implementation some time in the future but I've not done anything there yet - there's far more important things that need to be done just now.
Frankly I think showing off unfinished features like this is generally a bad idea. It raises expectations when it might not actually be practically possible to implement it in a working manner.