Where will we be one day, and what will we believe? How will we consider the world around us, and the people? How will we treat the known and the unknown, and possibly other intelligent lifeforms?
Whether close or distant future, something will be similar, and something… is very likely to be different.
Some parallel worlds have different time-flows, like the fabled dwelling-places of the elves: those who visit them under the hill for a night return to find that years have passed in this world. Perhaps it is the gate leading between the worlds which causes the alteration. If a gate were 'misaligned', the shift from '| |' to '| \' or '| /' as it were would lead to that difference, much as a light-beam split and bent by a prism ends up taking a longer path. There might even be a mathematical function linking degree of misalignment to alteration of time-rate.