Who else would be all over this if they could keep it to around 25% larger than the current 135L and 50% more expensive ($1,700 range I'm thinking). The current 135L is really nice but lacking IS and weather sealing are bummers, and the extra 1/3 of a stop with F1.8 would be appreciated for really low light work like concerts. I know it has been patented and the current L lens is a pretty old design - would be sweet if Canon brought this patent to market in 2014. Yes yes I know it will be a good bit more expensive and also larger than the current lens but I think the upgrades would be well worth it. I'm curious how many other folks feel the same way. What a sweet pairing it would make with the 70-200 F4 IS or 70-300L to cover the normal telephoto range.