I guess that depends on how much traction she gets politically. She's a high profile voice to make a speech at a march, or in front of the UN, but that's only due to her status as a child actress, and her childhood has been long over. She hasn't even had an oscar, or a young adult lead role, or even a capeshit role since. And the occasional piece of oscar bait isn't going to keep her in the popular consciousness. And without something to elevate her from her role as Hermione, I don't think she'll be taken seriously politically. As an activist, maybe. But even that depends on public recognition.