If you're so determined to have everyone's less "valuable" transactions on another chain, why are you opposing the fork?  Once we've forked, you'll never have to see another $2 coffee wasting precious space in your blocks again.  You should be happy to see us go.  Unless, of course, you end up having to admit that you need the rest of us to make this whole thing work.  Somehow it feels like we still haven't had an honest answer from your side about your real motives here.  I mean, which is it?  You say you want a system that doesn't include small transactions, but you want us all to stick around and support a network that will eventually be of no use to us because our "lesser" transactions won't make it in because the blocks are full?  You can't have your cake and eat it.  Either it works for the masses or it doesn't work.  That's Econ 101.  

You know full well that if you had a coin that only whales used, it would die a horrible death.  Otherwise you'd have done it by now.  You don't want to be kings of a worthless little molehill, so you need the rest of us.  So climb down from your high horse, admit that you're nothing without the rest of us and drop the whole elitist utopia bullshit.  You know that if there's a fork and you don't tag along, your ideals will only last about as long as the value of your network holds out, which I doubt would be very long without anyone else to hold it up for you.  All the bad things you claim will happen with a 20mb block won't happen to you if you stay on the old 1MB chain.  So why do you care if we fork?  Why are you so scared that we might leave you behind?  We'll survive without you, but you won't survive without us.  You know it.  We know it.  You have no other reason to oppose the fork.  

You.  Need.  Us.

When blocks grow to >1MB, less important (IE valuable) transactions will simply move to other less cluttered blockchains.

Individual central/local banks and payment networks will be replaced by any combination of sufficiently secured blockchains (merged mined and/or using different POWs).  The dark pools will be denominated in Monero.  Bitcoin isn't a one-size-fits-all solution for everyone and everything, although its blockchain technology will be extended for those purposes.