I don't think it likely either of these will dethrone WoW. First, the system requirements for both seem to be missing the "midrange computer from two years ago" that is the normal target for mainstream games. As such, they're only hitting the relatively small "extreme gamer" market. Next, there is no support for the Mac, which cuts out 14% of the total US market and much more of the game buying market. Third, losing a small portion of the market because of requirements can lose you much bigger portions of the market because these are networked games. If just one person in a group of friends has a Mac or a lower end PC, the entire group may well decide to stick with WoW or some other game that they can all play (especially if that one player is the cute co-ed gamer in the dorm).
Really, there is nothing wrong with either of these games, but they just aren't targeted at the same demographic as WoW, or if they are they are very poorly targeted. Some day someone will come out with a WoW-killer but I don't think either of these are even viable candidates.
Understanding is always the understanding of a smaller problem in relation to a bigger problem. -- P.D. Ouspensky