According to AMD the reason G-sync exists in the first place is because NVidia GPU's don't have the monitor sync tech integrated like AMD GPU's do.
If this is true, NVidia GPU's can't get Freesync, just G-sync.
But keep in mind, that's what AMD is thinking, I don't think there was any official word from NVidia weather they support the tech or not.
It's not true. Variable refresh is how G-Sync works, and it is supported by Kepler, and on DP 1.2.
The thing people still, it seems, continue to miss is that
it requires new hardware in the display to support variable refresh. Making it a VESA standard to be supported by the DP connection doesn't help, because the panels themselves, as currently designed, are not capable of understanding it. Even if that were adopted, it does not force display manufacturers to include the necessary interface control in the display itself that translates the instructions from the GPU to the panel. That DP will "enable" the usage does not mean that somehow, magically, the panels we've all been using that are designed at fixed refresh rates will somehow be able to change refresh rate on the fly.
This is not something that can be solved just on the GPU side, it requires new hardware in the display. An AMD executive acknowledged this in follow-up interviews.
G-Sync is not "dead for sure." It's the only thing that exists, because FreeSync doesn't. FreeSync is an utter hoax, a cheap, deceptive shot designed to steal some thunder from G-Sync's announcements at CES. And it seems to have fooled a lot of people, but fortunately people who have actually followed up have nearly completely debunked FreeSync's claims - both that it's free, and that it's simply a matter of updating the DisplayPort spec.