Not that many? There are millions who will be intrested just by the Elder Scrolls part, every major gaming site has covered ESO by now, alot of major youtube channels have expressed their intrest, not to mention all the commercials and such that will come when it will be released. Bethesda *or Zenimax* will make sure everyone will hear of ESO.
Yes, I don't know what happened with SWTOR. It had great mechanics and a truly stellar story arc (being a smuggler was awesome), but I guess it just didn't have enough bells and whistles or something. Maybe there wasn't enough freedom/small detail...yes, I think that might be it. It was a little too themeparky than what people expected. Don't get me wrong, the planets were huge and fun and there was enough things to do...just...hmm. I felt there was something missing that would have really tipped it over the top.
Maybe ESO will avoid this problem. I certainly would love to see them use SWTOR's voice acting, though. That was really, really cool.
I just edited the official Elder Scrolls Online website. Not sure if this is new or not, but just came across it. Looking fancy. Personally, I like more grittiness from the art. Not so much KoAmular.....But still cool