Times change, this is an indisputable truth. But nothing reminds us of this fact as well as a landmark statistic. If there was ever any doubt about the shift towards of mobile computing, then let this be it: personal computers no longer account for the majority of demand for DRAM chips. With 49 percent of all new memory still headed for PCs, it's hardly time to book the hearse for desk- and laptops just yet, but the statistic from IHS iSuppli