I agree, as a lay person, I'm not sure how the Curl will tempt people away from the Brompton. Maybe all those new patents will really result in a much better ride but that kind of info will take awhile to trickle down to potential buyers. And even if it really does ride better, people will still go with Brompton because...it's a Brompton.
As far as I can tell the Curl isn't cheaper than a Brompton. It's not any lighter. It offers 3 gears whilst the Brompton offers up to 6. It doesn't have a carrier block and that's a huge sell to many folks. And again, it's not a Brompton.
And I'm a Dahon owner and decidedly not a Brompton fan. The bike doesn't fit me for comfortable riding and I was slightly horrified to find out how heavy it was even as I was enamored by its compact fold. I would have loved the Curl to be lighter, have more gearing and a luggage truss--that would be a Brompton killer for me.