I don't know, but I can imagine a wireless headset that talks to a powerful machine. Remember also that by desktop we don't really mean a huge crate anymore. Laptops are still hard to miss out of daily work. I spend most of my day sitting next to one so I wouldn't say AR is not a desktop category.

And needs authoring and testing tools. And for many apps a (maybe wirelessly) tethered headset is fine.

AR content creation tools will likely be desktop apps similar to video editing software. Not that web-based is impossible, but these are probably going to want stand alone apps.

Also, enterprise AR ad placement, buying, and management software could be desktop software.

Pantomime is a networked augmented/virtual reality system that supports desktop, laptop, as well as mobile and tablet devices.

It's great to run the server on the powerful desktop, and use it to display an overall view of the world.

https://vimeo.com/149319403