When I used the Hololens I had the same impression you did. I too was blown away by the incredible accuracy of the tracking. What I don't understand is how Microsoft didn't launch a VR product to compete with Vive and Oculus. Given the strength of the tracking, it felt to me like they were so close to building a VR device that did not require all the cables and tower set-ups that the other two do. Clearly I must be missing something, but I just don't know what it is.