A unified theory is more a reduction of an idea, a useful model is a system, process, or mechanism for getting a desired result.

The hope is that at some point this philosophy can provide a useful model

My hope is to eventually create a useful model to describe the way we think. I plan to go through the different aspects that could be involved in this model incrementally over time, and eventually describe a structure for thought that may provide useful in day-to-day life.

The goal is to eventually make this a useful model.