LOS ALTOS, CA – Changes in corporate PC purchasing is slowing market growth, according to a new report. Electronics equipment sales will fall this year but will recover in 2008, says Ed Henderson of Henderson Ventures in his latest newsletter.  “Corporations no longer feel compelled to upgrade their systems every three years because hardware and software advances don’t offer the productivity improvements that previous upgrades have given,” Henderson wrote.  The U.S. has been particularly hard hit: PC unit shipments grew 1% last year. Worldwide, shipments grew 9.9% in 2006. However, forecasts call for a slowdown to 7.1% this year before recovering to 10.2% in 2008, Henderson said. Demand from emerging markets for low-cost cellphones boosted shipments to 993 million in 2006, up from 430 million in 2002. Unit growth is predicted to dip to 13.1% this year and 10.3% in 2008, Henderson predicts. Global equipment values will fall to 6.9% in 2007 from 9% last year on slower unit growth for certain key products. Henderson predicts a rebound to 8.1% in 2008.