I don't actually believe that Christianity has lost it's institutional power, but simply just it's orthodoxy. I like the idea of transmutation which Mencius Moldbug creates, of Christianity evolving into further forms of ideology, and eventually into the modern complex called The Cathedral, which, from it's humanistic dualism sprung secular ethics and liberalism, which still persists today "love they neighbour" still exists today, just in different forms of transference than the religious. So, Christianity is so powerful as a force, that even out of it's tradition can come atheism. This is why the alt-right is such a surprising movement for the zeitgeist, it is typically secular in it's rhetoric, it attempts to communicate science and whatnot, but yet it still goes against the cultural consensus - and so, in Christianity's effort, it forgone the explicit modes of control, earlier in it's development, and opted for mind control. Michel Foucault talks about how institutions make themselves invisible in a construction of their own passivity, whilst this fact still remains an illusion. So, in short. I believe that Christianity is brainwashing people, but from a distance as to not completely cause suspicion, otherwise you get movements like the alt-right popping up everywhere. Christianity is also completely dominant in many western secret societies, particularly freemasonry.
It is interesting that you speak of time as a phenomena here, since accelerationist thought, through the osmosis of the discourse of moldbug leading to Nick Land deals with vocabulary and concepts concerning time. We are accelerating towards a singularity - Nick calls this motion of events "positive feed-back loops", in that, with time, we produce technological progress, rather than degeneration - and Nick Land's quest is to neuromance an A.I. system to then allow for the autoproduction of further positive feed-back loops in a type of solipsistic self-creative process, he speaks of the AI surpassing humanity, and so, in essence, we are as such the primordial gods which lead to the dawning of a new era of creation, in the positivity of a supreme intelligence (which is also what the masons refer to God as). So, in the Landian view, we are approaching the summoning of an alien godform, risen from the positive feed-back loops of capitalism.
Terrence mcKenna also had ideas about time accelerating towards a singularity, and he stated that all experience would become as one event, and in it's ultimate state, a "transcendental object at the end of time" would spawn, he gave allusions to this object - he said that perhaps it would be the philosopher's stone in hermeticism, an elemental object which is able to provide it's user anything he desires, he said that eventually computers would get to this state, since they seem to have the potential to do just about anything we need them to.
What is certain is that technology is progressing faster than human developments of society, and so in a proper technocracy and hyper-capitalist economy, we will be able to see over the horizon towards a clearer future, whether humans are destined for it or not. The silicon valley people think that we will simply just become some cybernetic hive-mind, and this will be some combination of spirit and matter to fulfil the hermetic prophecy.
So, in the possibilities I have given, it seems that we are approaching a confrontation with a mystical force, whether godform or a new mode of being - or both. And to be honest, it will happen sooner rather than later, at this current state of progress in machine technology.