Do most bitcoin users actually think that bitcoin is going to 'replace other currency, ATMs on every street corner', etc. at some point in the future?
I think bitcoin is going to replace most currencies on the internet, at least (because it's far simpler and cheaper)
I also think the internet is going to eventually replace or disrupt a lot of older, offline technology and businesses (fair bet; already happening)
So when you put the two together, it's not really that much of a stretch to say that bitcoin will displace or disrupt a large amount of existing financial infrastructure. Talking in absolutes is naive.