I feel it's an extremely important topic. I am excited for ESO, and have a lot of faith in the game; however, not including raid content will be detrimental to the games overall longevity and success.
This is a matter of personal opinion, and not a reason to not have this feature in ESO. There are lots of people who enjoy raiding, just like lots of people enjoy pvp.
To draw attention to the matter once again, we don't know for certain if that is true.
Of course by all means I fully support raiding and think ESO should have it (I don't know if it needs to be one MASSIVE focus of the PvE side of things though) just once again I don't think we should be jumping to any conclusions here

The main problem is how are we going to keep being enganged in PvE after we reach endgame without Raiding?
Quests and exploration is great for the first 2-4 months, but after that there really needs to be some serious progression content. Do you think WoW would still be alive today if it did not have any Raids? Of course not.
I am personally ok with Raiding being taken out as long as THERE IS SOME SERIOUS ALTERNATIVE.
I think most reasonable people here can agree that adventure zones and some large group bosses are not a serious alternative to progression raiding.
I hate to see this game become another GW2, thriving for 2-4 months before burning out, but it seems thats where it being headed.
Except we don't know what those will look like, especially adventure zones which we know next to nothing whatsoever about. So jumping to the conclusion that nothing can replace generic "raids" or even simply replace it's name is a bit on the extreme (IMO).