Who could the forkers be? Bitmain or some opponent? The temporary bump in price may look good for Bitmain's books with IPO investors, but I think consensus is that the steady post-fork value will take a dent. This makes it less likely that it is a Bitmain tactic. But are there any real opponents in that camp?
Serious question? You must have been offline for quite some time.
Synopsis: one group wants one set of changes. Another group wants a different set of changes. Though both sets of changes could coexist, both groups are insisting upon only their changes. In the face of this, there is another group that insists on no changes. And one last group that is building a client that any or all changes are selectable a la carte.
We can end up with one, two, three, or more branches coming out of the fork date. Who is the forker and who is the main chain is up for debate.
See the Bitcoin Cash thread for more info.
I'm still hoping for a kumbaya moment.