Nearly two years after the launch of Microsofts Surface tablets, were still waiting for a fully touch-optimized version of arguably the companys most important product: Office.For iPad users, though, the wait is about to end.While it might seem odd for Microsoft to launch an iPad version of Office before taking care of its own Windows tablets, the move is indicative of new areas of focus in the Satya Nadella era. Microsoft has been building iOS and Android apps for some time, and the company is increasingly pushing its software and services across multiple platforms.