Whatever it is -- retail resellers all over the world (or at least in some countries) should be happy with Sigma's decision to release its 24-105 version with that MSRP
This should rise demand and popularity of unkitted 24-105 L. (And probably its price too.)
I can easily imagine a salesman in photo store babbling something like:
"Yes, this is a new Sigma 24-105! It's a great and mighty lens, just released! But... Look at this display for a second -- this is original Canon 24-105! See this red ring here? It's L-lens! Feel how small and light it is! IQ is just is as good. Do you like it? It's usual price is 3 hundreds more than Sigma. But today only for you, I can sell it for the same price as this 3rd party Sigma! And I even will add a filter and this Lowepro case for free!!! Because I see you are real 'pro' who need a lens like that!"