Re: Not yet.
I also don't understand how using my credit card is easier than using an Oyster card. After the initail sign up for auto top up and setting up a direct debit to pay my credit card in full every month, they become interchangable in usage.
The answer is - it isn't. Not for you at least. They aren't making this change to help you (where 'you' represents a random variable defined as 'someone who already lives / works in London and uses TfL services at least once a day). TfL are making this change because:
a) it simplifies their model, as they aren't having to run three or four charging models (cash either on the bus/tube or paid for as a ticket in advance; debit/credit card on the bus/tube or in advance, contactless debit/credit card and Oyster.) Look for them to phase out Oyster in four or five years when everyone has had their current card replaced with a contactless one.
b) combined with a) above, it practically removes any requirement they have for handling cash at all (as stated in the article).
c) it makes life for tourists / other irregular London visitors much easier, as they don't have to prat about getting an Oyster card in the first place, then topping it up yadda yadda yadda...