[smoldesu]

Learn 3D modelling. It's hard to say what future interfaces will look like, but you should definitely learn the asset creation pipeline.

I've been using Blender for close to a decade now and cannot recommend it more. If you spend a few hours a week practicing your 3D modelling, you will be well-poised to start creating content when VR/AR adoption kicks off. Another safe bet is WebXR, which Apple has more-or-less confirmed support for (alongside Meta).

[uLogMicheal]

I feel like most modeling is going to shift to generative contexts where the application provides robust descriptions to the user's client and the client rebuilds a representation of the object that the client is capable of rendering. These descriptors could also be sent and rendered/streamed from remote devices too.