When you use an oculus, if you need to do something like reply to a text, check an email or reply to someone on social media, you have to take off your headset or kill your current task and switch to virtual desktop.
Having all your iOS apps on it, and being able to multitask means people won’t be taking off their headset as often and they’ll not have to consider dedicated VR time.
To me, that’s the biggest software differentiator