$700 for a 50mm f/1.4 IS with optical performance like the 35? Could be interesting...
I just don't see that happening. Why would Sigma release an even more popular focal length, with image stabilization, and the same (or better) optical performance as their 35mm, but price is $200 cheaper? If anything, I see this lens launching at $899, just like the 35mm, if not $999. In my personal opinion, Sigma's 50mm Art would not be competing with Canon's 50mm f1.4, it would be competing with Canon's f1.2L. Unless of course Canon launches a higher end 50mm f1.4 as well.
At any rate, I'm ready for a new Siggy 50mm after seeing their 35mm, for sure.