If the wallet thing is that much of a problem just get a thin one and you don't even need to take the card out.
Its not just that the thumb thing takes longer (it does) but it makes the transaction more ungainly.
Imagine getting on to a crowded bus. Which is easier, slapping your wallet against the big yellow circle whilst walking on or placing your phone on the circle and then pressing the button on your phone?
So regarding that transit card question, perhaps the security can be tailored to the type of transaction. If it's a transit card, no need for TouchId, if its a credit card payment, yes to TouchID. I know some people who stick their transit card behind their phone by tucking it in the case (clearly not Google Wallet users). Ends up being pretty effective since most people are on their phones in the subway anyway.
But as someone else mentioned, we really should be moving away from the concept of carrying 20 cards. I have my AAA card, my health insurance card, my debit card, my ID, my school ID (Asians can always get away with looking like students still), 2 credit cards, sometimes the corporate card, etc. I try to minimize the cards i carry and I throw out the corporate card when I can, but I end up forgetting it more often as a result. I'd love for a way to go digital someday so that I don't have to worry about forgetting my wallet.
Yeah it's close but the easiest one doesn't involve having to buy £500s worth of hardware to make it work.
True, but lets not forget, most if not all high end phones have NFC today anyway. I'm not buying a phone specifically for the NFC feature, but if it has the feature, why not take advantage of it?
Which is great until your battery dies.
True, but hasn't battery use in phones improved? 3 years ago we were struggling to meet 1 day of heavy use, and now we're far better off. I have yet to be in a phone-dead situation. I also imagine it will be some time before we get rid of the physical wallet, but if we have the technology to do so, why not? It's like phone and snail mail still exist, but it doesn't mean it can't live side by side with mobile chat and email.