True, but boards/laptops very rarely have the required Displayport or HDMI 2.0 outputs to drive such resolutions at native refresh rates.
With HDMI, the problem is the chip itself, as until Kaby Lake Intel hasn't supported HDMI 2.0 in their CPUs. Sufficiently new DisplayPort has been supported a while, though, but you'd need a motherboard supporting it, as you say.