Let's take a history lesson.
When Windows 1.0 came out, Microsoft paid Apple to license their GUI patents, because Apple had invented those software features.
When Windows 2.0 came out and Microsoft improved the GUI with their own features, Apple sued Microsoft for copyright infringement. It was decided that out of the 189 GUI patents, 179 were covered with the licensing that Microsoft had spent and 10 were the only feasible way to express that idea, and the suit was thrown out.
This is not the case in either patent Apple won on today, Samsung hasn't paid Apple to license the patents and there are other ways to express that idea (i.e. ways Samsung could innovative or as you put it, iterate). The other point this isn't something that's new, there's been patent lawsuits back to 1980's in regards to software.
Nothing's free in this world until it becomes public domain. These are not public domain. Samsung needs to learn how to pay licensing fees like the rest of the companies have to (Microsoft, Apple, Sony, Nokia, Motorola, etc). Free ride is over.