It's possible to talk about this without braking any NDA as you can talk about what info that has been released to the press.

This video will answer the question http://www.youtube.com/watch?v=idUP2u1ttns

But if you don't want to watch it just think GW2 as they try to do the same thing in this game with going away from the static traditional tank healer DPS holy trinity.

Shoddycast? Don't ESO have a chain of their own? http://www.youtube.com/ZenimaxOnlineStudios

It is indeed very open, the combinations are great.

Actually not so much like gw2 ^^

In gw2 they removed the holy trinity and forced every single player more or less into the damage role, yes you could equip some supportish type of abilities but those where mostly extremely weak (stuff like get knockback immunity for 4 seconds every minute etc).

You could not create a pure healer character, it was a dd with some minor healing abilities that could never outheal against focus fire.

Eso on the other hand will have the holy trinity if you want to play a pure healer you can do it, if you want to be a pure tank you can (and if it works correctly you can do so with all classes) etc

but it also allows (presumably) to create any hybrid inbetween, want to be a Stealth Healer? pick Nightblade and resto staff...

Heck, from reading up on GW2, there was one slot on your hotbar that was specifically for healing. Downright mind-blowing.

Err I love GW2, the no-holy trinity works well for that game in my opinion. It would be nice to slip on the old healer boots for a change however.