1) Sure, that works as well. But most countries don't have contactless cards, and those that do only allow smaller transactions without entering PIN (i.e. < £20).

2) There are apps like Uber and Hailo, where you automatically get billed at the end of your ride. Hailo is used by a lot of London black cabs, and most of those don't have a card reader in their cab.

Don't think there is an easy answer. If the contactless readers accept both cards + apple pay, that would be nice. Some people will prefer one over the other anyway.

I do know I have a significant amount of cards (some personal, some business), and being able to leave some of those at home is great. At the end of the day I don't really want to walk around with 10 debit/credit cards for various purposes. That's one problem Apple pay and these apps solve (to some extent).

2) Uber to an extent but that's just storing your card information.

GP is referring to Uber\Lyft etc