I hope this will not turn out to be Skype. (OK, I know there will be Skype - what I mean is: If they're talking of a yet to be provided video chat service, I hope they're talking about yet another alternative based on free standards.)

Why? The 770 was sexy because it was offering the hope for a free tablet. Some of the software was free. They used Jabber/GTalk. They promised (never really implemented) SIP. It seemed they'd go for open standards. This was their Unique Selling Proposition. (And could still be - Apple's iPhone is much more exciting in hardware, but it lacks all of the above.)

Moving away from this track would mean giving up the only USP Nokia has. There are plenty of Skype-enabled devices out there. (There's plenty of proprietary binary images you cannot recompile for a different platform.) That would be a tough competition...