Microsoft gave an early look at its next-generation Surface Hub 2 today. It will go on sale next year, with certain selected customers testing it this year. From a report: Microsoft's Surface Hub, its conference room computer, was something of a surprise hit. The system has been in short supply since its launch about three years ago, especially in its 84-inch version: its combination of video conferencing and whiteboarding makes it a collaborative tool with few direct competitors. The central feature of the new system is that it's a 50.5-inch 4K display with a rotating mount. Instead of the traditional 16:9 aspect ratio, the Surface Hub 2 has the same 3:2 ratio of Microsoft's other Surface systems.