I'm very surprised to see even this much interest. F4 max for a 'portrait' lens? And, if you need to stop it down a bit for a bit of 'edge,' you're looking at 5.6.... DOF-wise, may as well be shooting with a small-sensored digital compact. Alright, i exaggerate a bit, but.... I don't even have medium format lenses that are this slow.
Seems like the market is saturated with normal and fast glass, so the manufacturers are going slow (Leica, with its Summarits, too) just to put more products on the shelves. Choice is good, sure. But, how many of these things can they sell? Their only hope is that people flock to it because of some fabled 'classic imaging' characteristics, like they did with the Sonnar-C 50/1.5. I wonder if the focus shift 'feature' will be enabled in the Tele-Tessar. Bonus!