I'd love to make a DIY spherical globe display, even if it were quite limited compared to the official SOS model. I imagine setting up the projection is the most difficult aspect... anyone have resources on the matter?
Were I to grab a projector and a hemisphere screen, I'd probably just reproject to azimuthal (or maybe even conformal), point the projector at the screen, and hope people don't pay too much attention to the very edge.