Apple needs to prove why its mixed reality headset matters

"Why would mainstream consumers — not the geeky early adopters or impassioned gamers — want to wear something on their head for extended periods?"

"A mixed reality headset wouldn't be like the iPod or iPhone, which expanded the possibilities of existing products but could easily slip into your pocket. It's not just like the AirPods or the Apple Watch, accessories meant to compliment Apple's existing hardware. A headset, by its very definition, would have to be an all-consuming product, a persistent reminder that you're seeing the world through Apple's eyes."

My guess is that it will be too expensive and that it does not have a 'killer app' beyond immersive gaming.

There are already lots of VR game competitors and non-VR game competitors are cheaper and already in use.

What could it offer that is not already offered elsewhere?