> Out-of-order execution and pipelining date back to the 1960s.

On that note: I read The Soul of a New Machine a while ago, which is about a team of engineers designing a computer with a new architecture at the end of the 70s, and while it didn't go into the specifics of how the CPU was implemented it mentioned features such as different layers of cache between the CPU and the RAM, out-of-order execution, instruction prefetching and branch prediction. You'd be surprised at how many things in computers have already been around since the 60s.