Looking forward to them!
...if they could add master function in the 430ex II replacement, I am definitely in.
Unlikely. There's no technical reason the 430EX II can't be a master, the control signals for Canon's optical triggering come from the main flash tube, and the 430EX II obviously has one of those. So expect a replacement 4x0EX flash to be slave only, but able to be triggered by both RF (600EX-RT or ST-E3-RT) or optical masters.
Yeah, I guess so too. That is like the only thing that really differentiate 430ex from 600ex.
But thinking about it, it is somehow strange that Canon decided add master function to 90ex, which is way cheaper than ST-E3-RT with more functions (being a not-so-great fill flash on its own)