If you are a fan of TES, or are interested in the online game, I'd suggest watching the above video.
Judging by that closed beta leak a while back the actual game build is much uglier. But the beta is very young, and I have high hopes for the build we'll see at E3. (I'm assuming it'll be there)
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The key is endgame content. Lack of stuff to do at the end of TOR is what killed the game, and I'm hoping there's plenty of stuff to do in TESO besides grind for slightly better gear.