Samsung Galaxy Note
The original Samsung Galaxy Note smartphone was never meant for the success it saw, but holy hell did Samsung really make waves with the original Galaxy Note. It was a smartphone that was often referenced to as a "phablet" as it was so much bigger than a traditional smartphone like the first-gen Apple iPhone and Samsung Galaxy S, but look at the Note now... one of the best-selling smartphone ranges of all time.
Intel X79 Chipset/Sandy Bridge-E
Intel released quite the HEDT beast in 2011 with its X79 chipset and Sandy Bridge-E family of processors, offering quad-channel DDR3 support and 40 PCIe 3.0 lanes. The LGA 2011 socket was born, and supported the then-insane Core i7-3960X Extreme processor giving enthusiasts a huge 6C/12T at the time at 4GHz.