According to digitimes.com, Intel has postponed the launch of next gen processors based on Ivy Bridge architecture to March 2012. By doing so, company gave notebook manufacturers a time advantage to sell out supplies of products built on current generation processors, a.k.a. Sandy Bridge.
To remind you, the first batches of Sandy Bridge supporting chipsets had potential SATA2 port error. Therefore all products based on Revision B2 chips was recalled, revised chipsets got B3 stepping and its products shipping restored in April. All in all, bulk sales of Sandy Bridge based systems began in April instead of January.
The decision for Intel to delay the launch of next gen platform was also triggered by lowered demand for notebooks. The last is caused by upcoming army of tablets.
Ivy bridge mass production should start in November 2011, however, market entry is shifted from January to March 2012.