re: After one more orbit around the galaxy, the Earth will look like this
Go to the site that the map is based on and you will see past landmasses and climates along with the supporting scientific rationale. An excellent site!
On a sobering note the climate chart therein shows how UNUSUAL the time is that we live in. Since Cambrian times, the Earth varies between "Ice House" conditions with ice at the poles, to "Hot House" conditions, much warmer than now with no polar ice. The chart shows Gaia's 'recent' (over the past few thousand years) trend upward in temperature towards the more 'normal' Hot House. Add in anthropogenic activity to the natural trend and we'll be back to Hot House sooner than later.