Announced via the company's developer-focused Hacks blog, navigator.mozPay() is a Javascript API crafted in the vein of Google Wallet, but with a key difference: it'll allow directcarrierbilling and support for various payment providers.
Here's the thing, though: for many, directcarrierbilling could be a big part of that "seamless user experience" thing, and recognizing that, Nokia had planned to offer it from the get-go in the US (along with eight other countries) when it launches next month.