After a quick crowdfunding campaign, we can now say for certain that Key together with Asmik Ace will be working on a planetarian VR animation. According to the crowdfunding page, the project will be based on the projection shown to the protagonist in the original. Yumemi, animated in 3D, will act as a host and provide explanations of the stars shown in a 360 degrees environment around the viewer. (The 2500000th customer commemorative projection will not be included). D&D Pictures, who assisted with the anime and its planetarium related event, will be also be working to make sure the presentation matches up with a real planetarium. It’s stated that the plan is to make the completed video available not only in Japan but also on global platforms and devices. As of reaching 100% there is yet no announcement of stretch-goals for the crowdfund, and the expected delivery for patrons is April 2018.
Obviously a lot of what the project will be like is still in the air, but from my limited experience with VR visiting a planetarium should be really cool especially together with our favorite slightly broken robot. Below you can view the demo footage of the 3D animated Yumemi.