How does that follow at all from the blog post? I'm no fan of Oculus being purchased (at all), but what in a product design team joining Oculus suggests any "long term goal here" about devices for marketing, sales, or hooks to your Facebook account, let alone ditching a game display device?
I think the far more likely reading is that they know the device sitting on your face is make or break for a VR device hitting the mainstream, and they have the chance here to basically define what a VR display is for the next 10 or 20 years if they do it right (the evolution of game controllers is actually a great analog of this).
We can speculate about a Google Glass competitor, and certainly the market would react to a prediction of that, but step 1 is getting people to put something on their face.
I think the far more likely reading is that they know the device sitting on your face is make or break for a VR device hitting the mainstream, and they have the chance here to basically define what a VR display is for the next 10 or 20 years if they do it right (the evolution of game controllers is actually a great analog of this).