sure... TBC comes out in 2007.......
As for T5.... sh00r, wonderful, scattered over all different end-game instances, few pieces in each one. Happy raiding, people, THIS will take some time to get.
also... are you sure it's T5? i didn't check the video link (i am at work and can't today), but most of the time people submitted videos on youtube / google vids, etc calling it T5, it being T4 or even another different set.
Wow has a many different sets, and i have not seen the Tiers, officially by Blizzard.
Nevertheless, the designs are nice and some sets do look good.
Come and join on Starcraft 2 as well =]