Certainly there are better headsets out now than the original Vive, but I'm not sure I'd classify it as obsolete. You can still take a modern VR title and play it and get the full experience. Calling the original Vive obsolete at this stage would be like calling 1080p monitors obsolete.
Tracking keeps improving in important ways, the resolution is not amazing, and we still have more than two years before we actually hit the point where I'm saying it will be obsolete.
