Chat?
Whoa… I mean, talk about whoa. For the time being, I'm going to assume this is kind of cool. I don't know if it's really useful or anything, just maybe a novelty. It could be used by webdesigners, but I imagine that 99% of the time it will be used for dirty, AOL-esque talk. Via wait-till-I-come.
I saw what's the point? We have AIM, MSN, etc… why the in browser option which is limited to specific web pages? From my own observations, these inline chat windows on web pages do nothing but attract cyber freaks.
Apparently the point is that web designers can show mock-up-sites to clients and chat live, or discuss mockups with each other… it really isn't useful at all but then there is probably a community of users who like to chat with each other while browsing popular sites, kind of like shoutboxes. Eh, I see a lot of useless apps, this is just another blip on the radar.
Geared towards designers or not, I know for a fact that I would be annoyed having to move the window around within the constraints of a browser.
I think the best way to discuss a site mockup would be via Skype. That or mind telepathy.
The browser will become the new operating system (or the operating system will become the new browser). As such, in the future inline chat may become standard.
As a tool for website developers to consult with clients, it would be reasonably useful so long as it has the functionality for making markings on the website with some kind of drawing tool. This would really make the job of consulting with a client much easier.
@ Lloyd: Oracle and Sun were pushing the "network as the computer" thing a long time ago. It obviously never caught on. This browser thing with the Internet isn't much different. I can see some applications moving online, but it's silly to say a browser can be an OS.