Google Play Edition 4.3 "soon"
I believe the google play editions will get their 4.3 updates very soon.
On the official android website, the latest build number of 4.3 that is going to be pushed out to nexus devices is "JWR66V".
The latest leak for Google Play S4 has the same build number (comiled on 2nd week of July I believe), and it's pretty stable. I can't say the same about HTC ONE (there hasn't been any leaks), but I' sure they're pretty much up to date on the build number too.
Since carriers are not involved here, Samsung and HTC will be able to push the update really soon. I hope this means that the updates are going to be pushed out within days. weeks at most.