Microsoft have purchased many augmented reality patents for 150 million dollars

[ERP]

Resolution is trivial the only reason why FPV goggles haven't made the leap to 1080p is due to transmitting that HD video signal wirelessly long distances at acceptable latency levels.

The latest FPV goggles have SVGA resolution, glass optics and a bunch of stuff built in that adds to the total cost. Without these extra features the cost would be a lot cheaper for example a "dumb HMD" for VR. MS could very well be ahead of SONY given their superior Kinect2 hardware design. I don't think it is inconceivable that MS could have dual purpose AR/VR goggles in the prototype stages already. In fact by the time SONY actually releases a production VR headset at a reasonable price everyone would be at a similar stage. Display hardware is not the problem.

The primary reason that FPV goggles are limited to SD resolutions, is almost every reasonably priced version uses the kopin micro displays, and they happen to be SD.
Fat shark has a new dominator model out this month that's 800x600, they term it HD ready.

FPV is a niche market, low production runs limit what can be done withe cost. That's especially true in this space, where mass the primary cost of a custom lens (assuming it isn't glass) is almost entirely based on setup costs.