Xreal 4K?

I want to buy the Xreal One Pro. I'm currently still on the original Air 1. I'm worried though that I'm going to spend $600 on the One Pro and then they're going to release a 4K version 6 months later.

Anyone know what the current state of development is on 4K optics? Is this on the roadmap? I'm assuming the industry is waiting on Sony?