Qualifications

Following a recent discussion I am left wondering what qualifies as a new (or different) form of church. It was suggested that the qualifications were one or more of a list that included:

• Meeting on a day other than Sunday
• Meeting at a location other than a church building
• Finding ways of worship other than singing
• Finding ways of discovering other than preaching
• Meeting around food or a film
• etc............

I pointed out that the group of which I'm a part does all of these things but is thought of only as a small group within a larger church rather than a different form of church. Why doesn't it qualify? Is it too small? Well, the size limit is defined by the location, which is one of the qualifying factors for being different. Is it that some members of the group attend Sunday services? Well, their desire to serve and resource other forms of church should be seen as a positive outcome enabled by the different form.
I think the difference is more fundamental. The qualifying factors above are superficial and reflect the practice - they do not address the ethos, the underlying thought processes, the 'generous orthodoxy' to coin a phrase. What is the difference? I don't think I can articulate it in such a way that it would fit on a page - maybe others can attempt it!
Is it possible to conduct a different form of church whilst still associated with a traditional church? Will those in the traditional form ever understand where you're coming from? Does it matter?
Anyone fancy addressing the many question marks above?