Skill Tree or Trees?

How do you think the skill and/or stats will be set up? Is there going to be some sort of “skill tree”? Do you think synergy between skills is an option like one skill building on another? I guess I have like Diablo II suck in my head, but what they was kind of cool. Or are the skill going to be more like a rarity of trees like Skyrim?

I guess its like this:
If you do things you’ll get better at it
your character is defined by your choices, there are no class restrictions, you can be a knight, thief, bard etc.
thats also what they said on the website

You’ll improve your skills by using them (TES like). And there will be perks (Fallout like) obtainable from NPC trainers and leveling progress. That’s what I remember. I think Dan described it in last videoupdate (gamplay stream) its pretty long. Watch it if you hadn’t yet.