Microsoft plans to launch the Surface Pro 10 and Surface Laptop 6 in a few weeks’ time, boasting a new OLED screen as a key upgrade to the Surface Pro tablet, according to a report. Windows Central, usually a reliable source for Surface leaks, reported that the two Surface devices will launch on March 21. Unsurprisingly, they will include new Core Ultra processors, and also a Qualcomm Snapdragon X Elite option — which will also be available to the Surface Laptop 6, which would be a noteworthy change. In fact, it appears there will be other changes to the two devices. According to Windows Centr…