Apple support displayport 1.2?

Is Apple planning to support displayport 1.2 anytime soon?
Apple used to be pretty quick in supporting the latest technologies.
However there have been quad HD (3840x2160@60Hz) displays around for a few years now.
But apparently Apple hardware still does not support it.
On the contrary, it's selling their latest 2560x1440 thunderbolt displays as
"You’ve never seen a display quite like this. With built-in Thunderbolt technology, it doesn’t just give you more pixels."
Really? In fact I'm looking to REPLACE my almost 10y old a Dell 30' screen (3' bigger than that TB display) that has 2560x1600 (160 pixels higher)

It appears that my lenovo laptop has the Intel(R) HD Graphics 4000, which does not support displayport 1.2; it only supports 1.1a.
For the mac, it has thunderbolt 1, which does not support 1.2 displayport. The new thunderbolt 2 connector does support displayport 1.2

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