BCH proclaims they are the true Bitcoin and that they follow Satoshi's vision, so why is Bitcoin still so powerfull? Do you think in a not very much distant future things will change?
BCH's
proclamation is a fact. BCH has the characteristic of the true Bitcoin: low transaction fee, fast transactions, able to scale, etc. Despite of these facts, the Bitcoin today is still the true Bitcoin because it has the majority of the hashpower (an indicator of the true Bitcoin).
I have no idea if ever Bitcoin Cash will be the true Bitcoin in the future. It will if all miners and major players recognize BCH as the true Bitcoin.