I can't imagine that digital artists/animators have reason to worry. At the upper end, animated movies will simply get flashier, eating up all the productivity gains. In live action, more effects will be pure CGI. At the bottom end, we may see productions hiring VFX artists, just as naturally as they hire makeup artists now.

When something becomes cheaper, people buy more of it, until their demand is satisfied. With food, we are well past that point. I don't think we are anywhere near that point with visual effects.