My vote is still with the brain in a jar (or something close to it). Fewer resources, less area, and much of the life support equipment could be shared between

My vote is still with the brain in a jar (or something close to it). Fewer resources, less area, and much of the life support equipment could be shared between many individuals. There's reason to believe it would extend lifespans as well, provided that an entirely virtual life could be made worth living. I honestly think we'll achieve this long before we're able to properly or effectively simulate a brain with computers of any kind.