Nothing really surprising but I don't recall having seen this detailed explicitly

http://massively.joystiq.com/2013/03/22/pax-east-2013-hands-on-with-the-elder-scrolls-online-round-two/

Here's how it works: Upon each level up, you're granted a single attribute point and a single skill-point (skill points can also be earned by completing certain tasks within the game and not just via level-up). The attribute point, as previously mentioned, can be used to boost health, magicka, or stamina. The skill point, however, can be invested into any number of skills that you've unlocked. In turn, skills are unlocked through a skill-based progression system. If you want to unlock new two-hander abilities, you simply have to use a two-handed weapon, which will slowly increase your skill level with said weapon (ditto for armor and class-based abilities).

For example, during my demo time, I played as a Breton Sorcerer, and thus I began the game with a destruction staff as my weapon. As I played and began to amass more weaponry, though, I decided I wanted to try for a battlemage style of build, so I swapped out my staff for a big honkin' two-handed sword. Since my Sorcerer had never used two-handers before, he began with a two-handed skill level of 1. After a few quick fights, his skill increased to level 2, unlocking the cleave ability for purchase. Likewise, you increase your skill level in light/medium/heavy armor by wearing armor of that type. The system provides a great deal of flexibility, and by the time my two hours were up, my Sorcerer had gone from a fireball-shooting, robe-wearing finger-wiggler to a heavily armored battlemage who could interweave powerful arcane magic with devastating sword strikes.

I assume he's using "skill" to both mean the skill line (eg. two-handed sword) and the abilities that go onto the hotbar (eg. cleave) which is confusing. I'll call those abilities to avoid confusion. But I like the sound of it.

What I wonder is:

• Do abilities get better higher up the skill tree or are the ones you unlock at skill level 1 always useful?
  
• Do you need to unlock abilities sequentially like in a typical specialisation tree (like Skyrim perks) or can you just buy any that your skill level allows?
  
• How easy is it to earn points other than by levelling?

I'd prefer not to be locked into a single role all the way to max level. I just hope there's enough points available to let me be good at at least two from relatively early on.

don't know much about the rest but they said you will have enough points to unlock every single ability in every skill tree
some of them earned by leveling other are unlocked by doing something in the world (like it was in GW2)

Yeah, eventually being to able to learn them all is nice. But if, eg. you have to unlock them sequentially and it isn't easy to pick up points other than by levelling (eg. they might primarily be earned from end-game activities) and abilities do get better the higher up the skill tree you go, that could mean we have to be really careful how we spend those points and might lock us into a single role for a while.