If vibrating mascaras were the big beauty tech breakthrough of 2008, spinning mascara wands are the 2011 version. Bourjois Volume Fast and Perfect Mascara, which will be released in May, features a rotating wand that promises to coat each and every lash to give perfect volume and definition. You can watch a video of how it works here.
(image from beautyandthedirt.com)
Meanwhile, Dior introduced a spinning version of the ever popular DiorShow mascara, called DiorShow 360. This product allegedly "mimics a makeup artist's application technique for a perfect 360-degree lash-styling effect...this mascara features a spinning brush that rotates in both directions to adapt to every need, whether you're left or right-handed or you want to pump up the upper or lower lashes."
As with vibrating mascaras, I'm skeptical these would actually work better than a traditional non-moving wand. Still, I think these have more validity than the vibrating ones - I think that the motion could in fact yield better results than a manual wand.
I remember with the vibrating mascaras the mass fear of poking one's eyes out. Does a rotating wand present the same threat? Hard to say.
(image from sephora.com)