According to the posted statements, not only have the heads at SOE been considering a worldwide reboot like Cataclysm, but the news is that it is something they've considered for "many years." Beyond this surprise (after all, there was already a cataclysmic event in Norrath's lore -- players just didn't get to play that part as it fell between EverQuest and EverQuest II) was the even larger surprise that came with Smedley's assertion that EverQuest II players are not World of Warcraft players. "We have five years of World of Warcraft experience behind us to know that people that play EverQuest II don't play World of Warcraft. We don't see big dips in concurrency. We see a tiny drop for awhile."
For the rest of the interview, head over to Kotaku and check it out in its entirety. It's definitely interesting reading.