SignifierOne's project is extremely impressive and I've been following it since he first announced it. However, as I understand it the method does not allow a dynamic city - ie, one that develops and expands - the city is fixed for the entire game. This makes it ideal for new historical battles and mods over a short time period but not for mods that want to cover the length of time that EB does.

Plus, as eadingas says, it's an awful amount of work and you need to have a modelling programme to do it. So... one day, but not at the moment.