I was ecstatic when I'd first heard of it! The main draw I have towards Android rather than iOS is the ease of use of the interaction between apps. If the web can have the same benefit that I see on mobile, then there could be some explosively innovative interactions possible.

Web-to-web interactions right now are mostly just copy-paste and saving things to your desktop to upload again. It would be incredibly innovative to share more complex data structures between sites, like events, contacts, videos, etc.