From orbit to a mountain valley
The first big milestone: the whole planet, from space down to a single valley, in one seamless flight.
You can now start in orbit, pick any spot on the planet and fly down to it without a loading screen or a seam. The shape of the land is real, built from public scientific measurements of the Earth: every mountain range, river valley and coastline is where it should be, and so is the floor of the sea, from the shallow shelves along the coasts to the deepest trenches.
The whole planet is there from the start, and a few places get extra detail first. In the Great Smoky Mountains you can follow the ridges and hollows one by one. In eastern Turkey, Mount Ararat rises over the plain with its smaller twin beside it. Lake Van, high on the Anatolian plateau, stretches out to the far shore. The Serengeti and the Chesapeake Bay are already in too.
What you are seeing is the bones of the world. The colors are still simple, and the soft haze is a stand-in for the real atmosphere, which comes next, along with the light that makes a place feel like itself: golden evenings, morning fog in the valleys, the blue hour after sunset.