Yeah, I saw that too. I'm pretty sure I'll just get the Tamron, but no rush. I'm positive the new Nikon with VR will be priced a few hundred dollars more than the current version, so no thanks. I'm more curious as to what Sigma will ever bring to the table.
PS-I've noticed your sig only contains the EM-1 and V2, and was wondering about that. So, you no longer have your Nikon gear? Kind of surprising to me as I came from Oly & wouldn't go back unless they start making bodies with larger sensors. Loved the system, loved the lenses. Tried the mirrorless via the EM-5 and again, really like the body. I just couldn't push any of my shots in post the way I can with the D600. I would always get a bizarre mottled texture on skin, backgrounds, etc. I'm a patient guy, but my biggest peeve with Oly dealt with them announcing a product, then waiting an eternity for that product to actually hit the shelves. Anyway, it is a great system overall, with stellar lenses and REAL weathersealing. And at least their mirrorless stuff is lighter (my E-3 was larger and heavier than the D600). Enjoy!