This seems like interesting timing - hopefully the announcements at WWDC are taking advantage of Thunderbolt 2. This might be what Apple was waiting for to update the ageing Mac Pro.
"Thunderbolt 2 is currently slated to begin production before the end of this year, and ramp into 2014"
I sense some more waiting.....
"Thunderbolt 2 promises even more boutique external hard drives, external docks, and monitors. The best part is that they will be twice as expensive as the already expensive Thunderbolt 1 peripherals."
hopefully they release proper specs for the linux kernel team.