In order:
1. Walking on ships (fairly soon)
2. Walking on planets (not anytime soon but before #3)
3. Walking in planets with atmosphere & wildlife (much later!)
4. Base building (Long time away!)
I agree with that evaluation, the problem is to define "Soon" "Fairly soon" and a "long time away"
The chair is huge said the human...part one.

The chair is huge said the human...part two

Both are correct, the chairs are huge from their point of view