Details have leaked about the next iteration of Intel's Thunderbolt connector. The good news: bandwidth will double, going up to about 40Gbps from its current 20
. Power usage will drop by half, and it'll support PCI-e 3.0. The bad news: it uses a redesigned connector, and will rely on adapters for backward compatibility. From the article:
"Doubling the available bandwidth will enable next-generation Thunderbolt controllers to drive two 4K displays simultaneously, where current controllers can only drive one. The new controllers will allegedly be compatible with a variety of other protocols as well, including DisplayPort 1.2, USB 3.0, and HDMI 2.0. Intel will offer two different versions of the controller—a version that uses four PCI Express lanes to drive two Thunderbolt ports and an "LP" (presumably "Low Power") version that uses two PCI Express lanes to drive one port."