There are always ways to go. The argument against bitcoin is that usually big disruptive technology is never implemented by the first mover, as there is too much room for learning. Usually what happens is that a smaller system that can more easily adjust learns from the mistakes the first mover did and also makes use of the more prepared public.
That said, social consensus so far has resulted in the best decisions from all coins, and if any new technology comes to be, bitcoin can always adopt it.
But I´d say Bitcoin will be the digital gold and probably have the biggest market share, but it won't be the most interesting coin or that one that will have the greatest impact on society.
I agree. One of the fabric/platform chains will. It's just tough to tell which one that might be, it likely doesn't even exist yet.