Why is everyone so convinced that there will be significant updates to the Cinema Displays? Remember how long the non-Alu plastic displays were out? It must have been five years, while the Alu displays have been out for less then two years.
I can't see Apple making a bigger screen then 30" for desktop use. And if they were to, it would be for a multimedia center type thing, which not only is unlikely, but would never be released at WWDC. As a 30" display owner, theres no way a screen larger then 30" would be a feasible desktop display. Besides, anything larger then 30" is just too niche of a market.
Regarding a built-in iSight, I think the Pro market is just the wrong market for that. Apple has to be aware of its market, and b/c of security reasons, cameras just aren't feasible at this point.
Hell, who knows, I'm probably 100% wrong 😛.
Edit: Perhaps Apple will just bump the display to be HDCP compliant. HDMI is pretty much the same as DVI, for everyone who doesn't know 😉.