You care to tell us why? or is it just a hunch.
Im hesitant to believe ESO will be the next best thing. It could be, but theres not enough information for me to go off, since i havent played the beta.
Ive just seen to many MMO's become hyped up, and everyone on the forums saying its going to be the "WoW killer". then everyone gets hyped up and buys the $200 special collectors edition for the bonus in game items. A few months after release the game loses 90% of its original subs. and everyone is complaining about the game on the forums.
I don't know why Morrowind is so loved. I loved Daggerfall. I loved Oblivion. I loved Skyrim. I could not really stand Morrowind.
Most likely because in some ways Morrowind is that transition between the old a new age of TES games. But personally, that is what made me love it, it had features of both ages that really just bring the game to a great quality, as well as this
It's true... twenty years from now, people will be telling neophytes "where they can put it", 'coz they've been following the series since ESO.
I doubt or at least its highly debatable that ESO will be better than Morrowind, but more successful? Sure that is practically certain.