Ideas on initiating standard for In-App Payment?

Hi,

In-app Payment(IAP), or in-app billing enables developer sell digital goods from inside their applications.

It is widely supported in modern web app platforms, for example:

ü  iOS:           https://developer.apple.com/in-app-purchase/

ü  Android:   http://developer.android.com/google/play/billing/index.html

ü  FirefoxOS: https://developer.mozilla.org/en-US/Marketplace/Monetization/In-app_payments

ü  Tizen:        https://developer.tizen.org/add-on-sdks?langredirect=1#in-app-purchase

And nowadays more and more web apps are free to use, they tend to depend on IAP service to make profit.

Do you think it is time for initiating standard for IAP? Any thoughts, ideas on this?
Best Regards,
Deqing