While the FoV of a MEMS laser scanner display is usually only 35 degrees, Microsoft's patent application calls for the display to generate light in two different directions, with the projected images potentially overlapping in the middle. As a result, the field of view could approach 70 degrees, according to the patent summary.
Along with increased FoV, lower power consumption and a smaller footprint align with what it is expected of the next HoloLens.