To be fair, ESO could rightly be argued as a clone, but it would be cloning an older and more venerable MMO, Dark Age of Camelot. And it's not surprising, since there are former members of Mythic working on the development team. While we didn't get a good look at everything that ESO has to offer, there was quite a bit on the world itself and some details on the combat. There was enough there to discourage further comparisons to WoW, and potentially invite comparisons to both DAoC and Guild Wars 2.

Visually, the engine doesn't quite look like it's been fully optimized, but it does look great. Some folks might be expecting Skyrim-grade graphics on an MMO. I think they're dreaming for the moment. Any graphics engine for an MMO is going to have to balance speed versus performance. Right now, they're getting the speed side of things handled, but even at this stage, the performance is still quite good. How good, you may ask? Good enough that I could easily recognize locations from previous games without going, "Where is this?" Good enough that all of the character models they showed off from the various races look like they actually belong in the world and not just "Random Fantasy Race #7." When they get the final polish on this thing, I'm going to be very excited.

In the larger scheme of things, conflict and battle will extend to the macro scale with "realm vs. realm" combat. Just as RvR combat was a major part of DAoC, it will play a large role in ESO. Long time players of the series know that the Empire wasn't always the continent spanning edifice that it ultimately became.
For those whose exposure has been limited to Skyrim, the worship of Talos was a central theme in the game, since the warrior Talos would later be known to Tamriel's history as Tiber Septim, the man who forged the Empire and founded the Septim dynasty.
ESO takes place before the time of Tiber Septim, with three different alliances of varying stability and purpose. Cyrodiil sits surrounded by neighbors who would claim it and forge an Empire in their image, and you can bet that the Cyrodiilic kingdom is going to be the site of some truly epic battles. The engine seems to support a large number of PvP players in the same zone merrily hacking away at each other and it looks mighty good doing it.
With a projected release sometime in 2013, we can be sure there will be plenty of surprises and more information coming out. As a drooling fan of the series, I'm excited and cautious all at the same time.
- Axel Cushing