For people speculating that this means the end of framerate locks, it might not.
If a game is targeting 30 FPS, that means it might jump from 25-60 FPS unlocked. (I assume games will still be capped to 60)
While FreeSync
helps, you're still going to notice huge framerate changes like that.
What developers could do is pick an arbitrary framerate target though - like 35 FPS or 40 FPS - so it still retains some degree of consistency, but you don't feel it when the framerate occasionally dips below that.
With my G-Sync monitor, having a game that jumps between 40 FPS and 100 FPS depending on what is being displayed on-screen can be jarring.
In that situation it can be preferable to cap it to something lower.
Really depends on the game though, and how variable its performance is.
Variable Refresh Rate displays don't suddenly make you blind to framerates, but they make small fluctuations completely unnoticeable, and make bigger drops/lower framerates more tolerable.
Dynamic hdr and vrr dont require the new 48g cable at 4k60. So I'm hoping TV manufacturers can add these via firmware to 2.0.
The problem with that, is that they did the same thing with HDMI 2.0
They allowed manufacturers to update their HDMI 1.4 displays with HDMI 2.0 features, which meant that you had a generation of TVs that would only do 4K30 despite being listed as "HDMI 2.0".
It was a complete disaster.
From a consumer point of view, hopefully features like VRR could be added via firmware updates, so long as the manufacturers are not allowed to sell that as "HDMI 2.1" support.
The TV's scaler may not support those features though. It's not just software.
It will also be interesting to see if Sony can support this on the PS4/Pro with an update too.