Today Intel made a sobering, but not entirely unexpected announcement: over the next 3 years Intel will be ramping down its own desktop motherboard business. Intel will continue to supply desktop chipsets for use by 3rd party motherboard manufacturers like ASUS, ASRock and Gigabyte, but after 2013 it will no longer produce and sell its own desktop mITX/mATX/ATX designs in the channel. We will see Haswell motherboards from the group, but that will be the last official hurrah. Intel will stop developing desktop motherboards once the Haswell launch is completed. All Intel boards, including upcoming Haswell motherboards, will carry a full warranty and will be supported by Intel during that period.
It's not too tough to understand why Intel would want to wind down its desktop motherboard business. Intel has two options to keep Wall Street happy: ship tons of product with huge margins and/or generate additional profit (at forgiveably lower margins) that's not directly tied to the PC industry. The overwhelming majority of Intel's business is in the former group. The desktop motherboards division doesn't exactly fit within that category. Motherboards aren't good high margin products, which makes the fact that Intel kept its desktop board business around this long very impressive. Intel doesn't usually keep drains on margins around for too long (look how quickly Intel exited the consumer SSD business).
The desktop motherboard business lasted so long as a way to ensure that Intel CPUs had a good, stable home (you can't sell CPUs if motherboard quality is questionable). While there was a need for Intel to build motherboards and reference designs 15 years ago, today what comes out of Taiwan is really quite good. Intel's constant integration of components onto the CPU and the resulting consolidation in the motherboard industry has helped ensure that board quality went up.
In the near term, this is probably good for the remaining Taiwanese motherboard manufacturers. They lose a very competent competitor, although not a particularly fierce one. In the long run, it does highlight the importance of having a business not completely tied to desktop PC motherboard sales.