Do you hear that noise? If it sounds like a "Tock!," that's because Intel's 22nm Haswell refresh is here, though calling it a refresh may not do justice to the new microarchitecture. Haswell is a Tock in Intel's "Tick-Tock" cycle, meaning it's a major new microarchitecture that will set the foundation for new and upcoming desktop processors. Several Haswell chips are now available to order, including the high end Core i7 4770K part, which you can snag for just $280 if you happen to live near a Micro Center.
When's the last time you saw a tablet or smartphone overclocked to 5GHz and beyond? The answer is "never" and it probably won't happen for a long, long time yet. On the desktop, well, that's an entirely different story. Not only are high overclocks common, but early looks at overclocking results on Intel's Haswell parts would indicate that the fun is just beginning, and you don't even need exotic cooling to participate.