On one level answer the title question is easy enough (i.e. it is a theology system based upon enacted, inaugurated eschatology). Yet on the other hand, it is a question that is hard to understand and live out (i.e. is King Jesus really king of everything in our lives?).
In my wilder moments, I dream of answering the question of “what is Kingdom Theology” via a book I’ve been writing…granted I have been working on it for many years now and will most likely will be continuing to work on it for many more years to come…
In the meantime, I recently discovered a relativity short definition of Kingdom Theology on Bill Jackson’s website taken from a lecture by Derek Morphew, the South African Vineyard theologian, practitioner and pastor who is the best (in my opinion that is) Kingdom Theologian out there.
After you finished reading that definition, make sure you check out the rest of Bill Jackson’s resources as they are fairly cool. =D