Actually I like how Allison's career has progressed so far. We haven't seen her do any thing big yet but she has done some voice acting..for some reason I see her branching out as a director more than anything else. Not because I don't think she can't be a big star, just because I think her interest is leaning towards it. I believe she is directing another episode this season.
I too, am interested to see where her career will go from here after Smallville. I honestly think she's talented enough to take on almost any acting role, but I'm sure a lot will depend on the offers she gets. I'd certainly like to see her in a theatrical film, but her enjoyment of creativity may keep her doing indie stuff for a while.