[yanw]

You can always open a Gmail tab.

I think the Chrome app is an excellent cross platform solution (written once, easily maintainable). As for the protocol I don't think it is practical or even possible to built this sort of all encompassing communications platform on top of XMPP (see the competition).

I do hope there will be a Hangouts API.

[manicbovine]

I think the chrome app is one aspect of a cross-platform solution. But what if I'd like to chat without opening chrome?

I'll cross my fingers for a Hangouts API that allows me to write a standalone client. However, if chatting through a semi-broken browser extension (or memory intensive gmail tab) are my only options, then I guess the service isn't for me. I think the reason I'm annoyed is that I have a lot of important contacts on gtalk, so migrating away will be a challenge.

I know change is inevitable, that the service is free, and that they want to offer a better product. Perhaps my use cases are just too expensive to support in the long run.