Here's a look at noteworthy tech stories: Twitter hires a VR/AR chief and gives businesses tools for managing their accounts Not wanting to get left out as tech giants step over each other to unveil their virtual reality and augmented reality roadmaps, Twitter has hired Alessandro Sabatelli, once an Apple user interface designer and later the CEO of VR/AR startup IXOMOXI, to be its director of VR and AR. Sabatelli's LinkedIn profile says he's now working on the modest goal of "empowering us all in the spatial computing revolution." The hiring shouldn't be taken as a sign Twitter plans to join Microsoft , Sony , HTC and Facebook's Oculus unit in what's becoming a very crowded VR/AR headset market. A more plausible explanation: Twitter wants to create quality VR and AR experiences for video and other content.