Christmas Day online shopping results from PCs fell short of estimates, a new comScore report shows, despite having shown significant growth compared to the same holiday period of 2012. At $42.8 billion in spending for the 52-day period ending December 22nd, holiday shopping from computers rose 10% compared to last year, although that’s still 4% short of the anticipated 14% growth ($48.1 billion) estimate from the same company. The report shows that online shopping exceeded last year’s numbers when looking at holidays, with Cyber Monday taking the top spot with $1.735 billion, followed by Green Monday ($1.401 billion) and Black Friday ($1.199 billion). The top five product categories for this holiday season included three gadget categories such as video game consoles