I'd love to see the results! So far every example I've seen of LaserCube Lumia has been steppy.
Even if we got a smooth dot rotating I have a feeling a rotating wheel produces a different effect.
Also, a rotating wheel allows me to use laser pointers with unique colors for lumia. I'd love to see a gold and aqua blue laser doing lumia! RGB lasers allow for any color but a dedicated diode always looks better to me.
Mojo