Interesting. Can't wait for the price and some reviews. One thing that confuses me though, what's all this about:
Sigma is now offering a new "Front Conversion Service":
"SIGMA is offering the new Front Conversion Service for the SIGMA 14-24mm F2.8 DG HSM | Art lens. With this service, SIGMA converts the petal-type hood of the lens to an exclusive round component that lacks a light-blocking function. The new front helps prevent the lens from interfering with other lenses or from casting a visible shadow during multi-camera work. This is a for-fee service performed exclusively by SIGMA. Use of the service has no impact on the validity of the product warranty.