One great thing about the TES games are it's secret doors, traps and treasure chest. Very few MMO's have implemented this well in my opinion. EQ had secret walls you could walk through, some traps, but for the most part they added chest and traps after they put in instances. DDO did secret doors, traps and chest very well. Do you think TESO will do this?

I personally hope they do.

Another thing I hadn't thought about...
I'd imagine if they're building quests in a simlar style to other TES games they would.
I don't think the game being an MMO really stops you having these things, the problem I have seen with MMOs and these things is once someone descovers it and writes a guide about it you have people who just know where every trap/secret is.

As long as enemies don't run through their own traps (Radiant AI...) I wouldn't mind the feature if done right. I think it could be a potential issue from an MMO standpoint. But again, it really depends on what and how ZOS does it.