That UI stinks. Who would know to click on the QR code to open a payment request? A payment request doesn't even involve addresses that are visible to the user, it makes no sense that it is under "send to address".
I love Bitcoin Payment Protocol (except for its reliance on the "old" system of CAs), but I am not sure what is the use case here.<p>Is it just for payments where both sides use Coinbase? That sounds ridiculous, but that's what I see on the picture. And I still don't get which side needs to use Coinbase.<p>By the way, Bitpay already uses BIP70 - if your mobile application supports it, you just scan the barcode and the URL is included.