I don’t see end of denominations, but I see a significant decrease of denominations. A lot of the causes of the many denominations weren’t worth breaking off over. Denominations with incorrect teaching won’t be able to sustain their numbers & they will die, or they will decide to merge w/ healthy denominations when they realize they can’t sustain their numbers with their teaching.
The obvious answer is that our churches have little to offer to meet the real needs of people.
For example, In New Zealand, we have a serious shortage of General Practice doctors. This means that many are not getting the medical help they need, and people are suffering with sickness and yet they are forced to wait months to be able to get a consultation. When people are eventually diagnosed with cancer, it is often advanced and terminal, when it could have been better dealt with if the person had been able to see a doctor sooner.
We also have a shortage of surgeons and anaesthetic technicians. This means that many cannot get the surgery they need to alleviate painful conditions and disabilities. All our modern churches can do is to offer religious platitudes. The First Century church got people healed by the power of God. We read this in the book of Acts.
We do have churches and preachers who claim divine healing, but in spite of the promises, it is the norm that people don't get healed. The modern healing movement is akin to clouds without water. There is the appearance that it might rain to being the drought to an end, but nothing actually happens.
We also have people in our communities who are desperately poor, and some churches are doing something to help, but it is no near enough. We have prosperity preachers who are promising wealth to the faithful, but no one is getting rich except the prosperity preachers themselves.
It all boils down to the church having the theory about how to meet the needs of the community, but they can't make it work. Churches try to make themselves relevant to the world, but they become so worldly, that people ask, "What's makes the church any different to us?"
So, the question is, why isn't God supporting the churches with His power to enable them to reach out to our communities with a Gospel that really works and makes the Church a genuine power for good in providing answers to issues that the secular community cannot give?
Perhaps somewhere along the way, the Church lost what it had in the First Century, and all these centuries later, has never regained it, and many religious people are believing that the emperor does have a new suit when in actual fact he is walking around wearing just his undies.