When Windows 8 launched, there were many users who mourned the loss of the Start button, and many others who claimed that the new Start screen was much more useful than the Start button ever was. As tends to happen on the internet, this caused many heated discussions. With Windows 8.1, Microsoft has (sort of) brought back the Start button in response to the many complaints.
With Ivy Bridge-E, Intel is finally moving their enthusiast CPUs to their newer 22nm manufacturing process. While this does not greatly increase the raw frequency that the CPUs are able to run at, it does allow them to draw less power while doing so. In addition to the smaller manufacturing process, the new line also has more L2 cache per core and improved memory support.
Haswell is the codename for Intel’s 4th generation of processors and is the “tock” in Intel’s “tick-tock” development cycle. This means that it uses the same 22nm process as Ivy Bridge, but includes a different mounting socket and many refinements to the chip’s architecture.