With the tablet including prime and a discount (or included) version of this service, it could bring in another population to the tablet form factor. I'm thinking those that only have a Kindle now. The Kindle brand could continue to grow.
In fact it makes one question whether or not to have a conversation. Meaning, do I want to even do business this way? Will they treat me that same way as a customer? I get the vibe, I do. But if you really want to help businesses (B2B in your post), then you have to make it business friendly. Startups are a business and I suspect that is your market. But that rough approach may give you trouble expanding beyond that market.
Much good can come from this project even if it never hits a 1.0 release. The work to generate implemented standard API's, among other discoveries and innovations, can be incredibly useful to the web in general.
While I am hopeful and rooting for ChromeOS, I also will be rooting for and supporting B2G. While they have different platform targets, moving common functionality to the browser is something they can compete and innovate with.
Having more than one is always a benefit. Even if the particular route B2G takes is not one we care for, we can fork and improve at any time.