There recently was a rumor about a new flash at the end of 2013 ...
... but to be honest, this might be the next 50/1.4 update: Canon has missed the chance to introduce a coherent rt flash system with master, slaves and triggers - obviously they want to sell as many 600rt models as they can. Now that they've taken this route, some month or maybe a year wouldn't matter much for the 430ex2 update.
Man, they should just throw in the master capability into these flashes. Make the price close to the 600EX, I would still buy the 450EX, just for the portability. If no master functionality, I'll probably end up getting a couple to replace each of my old 430s + the ST-E3 instead.
Given three lights now, one of these new flashes makes more sense than the ST-E3-RT for the sake of having three lights off-camera. That goes double if the new flash can act as a remote release like the 600 can.
Man, they should just throw in the master capability into these flashes. Make the price close to the 600EX, I would still buy the 450EX, just for the portability.
I'd guess most people, including me, would still go for the 600rt if prices would be similar and the small flash would have master capability (which won't happen with Canon). I now seldom use my 430ex2 because I realized more power actually is very useful:
* hss power
* same m power when all flashes are the same
* 200mm reflector
* bounce
* diffusers
* recycling time
* ext. power port
* pc sync port
I'd be interested in a 430 RT if the flash doesn't grow any in size (unlikely) and if it stays under $300 (even less likely). I guess I'll be saddled to my 622s for a while longer.
@ Marsu42: I was wondering where you picked up your 66D. It's not yet available in the states