Once the oculus link comes out, it's over. 
The quest will have the same capabilities as mid tier headset.along with oculus dash and playing all those oculus and steam games while beating out the mobile and standalone market. 
With one move oculus gained not only the low tier mobile but also most likely the mid tier as well. It's pretty obvious Facebook's goal all along was inside out high resolution mostly wireless VR. Look at the sales of the quest, it's pretty obvious quest is the mainstream and with things like hand tracking coming out, Facebook knows exactly what it's doing. My bet is that the next versions of quest will be, higher fov, resolution, tracking and refresh rate, better SOC, etc. Save my words right now, once oculus link gets released and has gone through enough updates mid tier vr is over.