Re: Is it needed?
My bank have put contactless payment into my debit card already, despite my complete lack of interest. That said, it's actually proven useful quite a few times — a bunch of lunch places around central London take it, and even a few pubs.
But do I want that in my phone? Not really. It doesn't feel like it would add anything that I don't already have, and it'll probably be completely unclear who I'm meant to ring if the thing is lost or stolen and who is responsible for any resulting charges made that amount to theft, and I'll also have the risk of malware.
I guess it's an easier sell in places like the US where they haven't even quite evolved to putting chips in cards and cheques are still routinely used for all manner of transactions.