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Something like that. But it's actually that the payment providers who directly manage these bits of hardware need to implement token based auth according to Apple's spec.
Most small vendors are likely to use something similar to Square and choose a small third party device and process the payment separately from the EPOS in the near future.
The larger vendors will takes a while to implement as the depth of impact of these changes is fairly immense if you have, say, a roll-out to thousands of supermarkets to manage.
No.
https://developer.apple.com/apple-pay/Getting-Started-with-Apple-Pay.pdf
Apple Pay uses a different system based on using tokens as an abstract but trusted representation of the payment method... rather than the payment method itself.
It's a difficult thing to explain, but it's actually more secure as the tokens can be verified and are usually single-use only (the requestee/retailer has to declare the type of token they want).
Anyhow... different system, it's may be compatible with the readers deployed today... but it isn't compatible with the software infrastructure deployed against those readers today.