• Holo can't go full VR (a big con)

• Apple interface and likely the intuitiveness of its use will be superior. Its one of the things that Apple is actually really good at. Holo interface looks clunky. I like my Quest as well, but its a bit of a pain sometimes.

• Integration with all the Apple apps will be a big "I have a way to use this right now" element for first time buyers.

• Holo "avatars" kinda look sad in comparison

• Same price point

Granted I don't think Apple is going to sell many of the devices and it will underwhelm. VR/AR with a big heavy device is just a super hard thing to depend on. For multiple reasons it can't possibly replace the dominant uses of a desktop or smartphone. It will supplement for people who need something specific or want to have a big screen and versatility in screens and workspaces.

All of that said, I think the Apple vision will steal a lot of the market from the high end competitors and be probably a dominant device... but I really suspect it doesn't do much to meaningfully expand the market. It will probably have a short term bump that looks good, but it won't have staying power. VR is just really difficult.