You might make a case for "happening" with bitcoin, but the banking industry is far from "revolutionized" in the past-tense.
Besides which, currency and customer support are two very different pieces of a much larger pie. At best, currency is the "implementation detail" behind a much larger set of day-to-day usability concerns inherent in banking.
Well given that just with the bitcoin client alone many banking services are either no longer needed or already provided by the bitcoin network.
Savings, transfers(much faster than any bank transfer, I mean my bitcoin reaches it's destination before I can finish filling in the bank transfer forms), security. All there.
I don't need customer support when there's no problems. I've never had something so easy to use to buy on the internet before.
Besides which, currency and customer support are two very different pieces of a much larger pie. At best, currency is the "implementation detail" behind a much larger set of day-to-day usability concerns inherent in banking.