[Payments Architecture] A vision statement for the web payments architecture work

The IG are trying to finalize a short vision statement for the work we are
undertaking, specifically with regards to the architecture we will be
developing, for payments on the Web.

The document is intended to express the technical principles we consider
important in the design of the architecture and I'd appreciate some input
on it's content.

The document is also intended to be short, less than a page, and as such
not too detailed. It's purpose is to frame the design and allow all
stakeholders to agree up front that we are aligned on our vision.

The audience should be broad, and not necessarily payments or Web
technology experts, but since this is related to the design of a technical
architecture the content will be technical.

Please have a look at the first draft of this document and send me your
feedback.

https://www.w3.org/Payments/IG/wiki/Payment_Agent_Task_Force/Vision

Thanks,
Adrian

p.s. Thanks Ian Jacobs for the initial work in getting this started.