HDMI 2.0 possible on existing cards or are new ones coming?

With the push for 4K gaming and 4K TV’s becoming more affordable it seems only natural that HDMI 2.0 needs to be available to gamers for the 60fps needed to achieve this. It’s not likely that new 4K TV’s will have Display Port connectivity so what are Nvidia’s plans to enable their large installed customer base the ability to finally take advantage of those sweet SLI setups in 4K? Last year I built a new PC with two GTX 780’s for SLI 4K gaming when the 2014 models with HDMI 2.0 hit the street.