In my opinion, only offering a new forum software won't be enough to attract people. Its personality has to be very different from this forum. For example, quite a few people have been complaining about the high noise of this forum so you might get a good market share if you strongly discourage newbies across the whole board, or even go as far as only letting known faces in.
I wouldn't be interested in it, in that case. How did all the known faces arrive on the scene without ever being a newbie?
A section full of only new ideas would be awesome. You can't get that if you let newbies in because they haven't been caught up on all the ideas. 'All' is an exaggeration, but you get the point.