In the moved posts, Aristotle made the observation about changes in rankings, not about the search interface, which sent the discussion in a different direction...
Unstable search results, in which rankings repeatedly undergo drastic changes, are a clear sign of fundamental problems in Google's approach.
It's an interesting topic which deserves its own discussion. Let's keep discussion about Google rankings in that thread.
This thread is about the evolution of the Google SERPs interface as described in Dr Pete's article, and about the longer term trends those interface changes suggest. Neither the article nor this thread are about the day-to-day ranking algorithm, though the changes in Google's approach will ultimately affect a great many websites.
I've changed the title of this thread from "How Google SERPs might look by the end of 2014" to "How Google's SERP interface might look by the end of 2014", to clarify.
I should add that it will help to read the article before posting in this discussion. ;)