I'd really think that Samsung would be pushing all parties involved to get the 4.3 update out there to expand the market for their watch.
Samsung, yes. But I think VZW would be inclined to stall on the S3 update as long as possible (which sucks for us). They would probably try to get the S4 updated ASAP and leave it at that.
The reason being, they will use it as an opportunity to try and get people who are interested in the gear to upgrade to either an S4 or Note 3 and lock them into another 2 year contract.
It sucks as I am interested in the gear and have no desire to switch from my S3. But I can see VZW telling me the only way I can have it is to upgrade and sign a new contract especially if they have some sort of holiday promotion going on.
I agree with mikeman45 -- VZW won't give us anything until next year (they want their holiday sales boosted by upgrades). Samsung, however, may "leak" something for people like us in an attempt to boost their sales.
EDIT: I may stand corrected:
http://www.droid-life.com/2013/10/2...tes-for-gs3-gs4-note-2-and-gs4-active-leaked/