OK... Bitcoin is going to replace every major currency in the world, Governments are just going to give up and die, a perfect free market Utopian economy will just replace them where we all agree and decide laws and provide everything society needs based on supply and demand.
(Meaning corporations run justice and care for disabled people etc. for profit)
My Mum is going to learn about private key encryption, trust online or local wallets with her net worth, and we are all going to be rich. And I will be able to buy a car for 0.00000012 Bitcoins.
It's going to happen.
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
A list of things which replaced things hardly wins your argument. The £ (and other currencies) will become more 'digital' (liquid and easier to use online) to compete with Bitcoin and the majority of people prefer to stick with what they know.
Bitcoin has flaws... in your world the price of Bitcoin would keep inflating until only one currency remained (BTC), nobody would spend any money for fear of its value growing the following week! Why buy a car this week if its cheaper next week?
Arguably superior alternates for things are invented all the time... doesn't mean they gain mass adoption, so your list is meaningless.
Bitcoin has a big future, its just not what some dreamers let themselves believe. (In my opinion)