As of yet Dual Spec has not been implemented there have been whispers that it may com in the next major content patch (March) however this has not been substantiated. I Honestly would fully expect them to add it since it has kind of become an industry standard. The other things I think we can expect:
Damage Meters
Something Like DBM
Mouse over Macros
Things I hope they grab some of the add on ideas (cool downs flashing in the middle of screen), some sort of threat meter, something like outfitter....
I digress...
There are rumours that we will get dual spec and it WAS talked about prelaunch and we were told to expect it within the first 3-6 months.