It's been a long time coming for two of the game's original races who got the shaft when Burning Crusade introduced two new races with their own capital cities while gnomes and trolls continued to squat in Ironforge and Orgrimmar, respectively. Over the chat, developers mentioned that they were looking at revamping all the original starting zones, with particular focus on the two races. Now that Cataclysm is on the horizon and Blizzard plans to introduce two more races with the worgens and goblins, it only seemed fitting that gnomes and trolls get their due.
However, the developers were quick to point out that the zones won't get as "epic" a feel as the two new races in Cataclysm. They did reveal that they have "big plans" for the two races, hinting at the events set to come in a future patch, if not Patch 3.3.3. Blizzard also reminded everyone that they planned to overhaul all the starting zones with Cataclysm, which improves gameplay, quest flow, and overall experience. Now that these squatter races are finally getting equal status with the others, maybe Blizzard will finally let us see a gnome in the Cataclysm cinematic?